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- Microgramma heterophylla (1 revision)
- Diplacus ovatus (1 revision)
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- Trillium pusillum (1 revision)
- Selaginella subg. Selaginella (1 revision)
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- Poaceae tribe Brachyelytreae (1 revision)
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- Vauquelinia corymbosa subsp. angustifolia (1 revision)
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- Solidago canadensis var. hargeri (1 revision)
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- Polygonum oxyspermum subsp. oxyspermum (1 revision)
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- Dryopteris intermedia (1 revision)
- Tipularia discolor (1 revision)
- Atriplex oblongifolia (1 revision)
- Pityopsis ruthii (1 revision)
- Atriplex argentea (1 revision)
- Atriplex coronata var. notatior (1 revision)
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- Heterotheca villosa var. depressa (1 revision)
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- Opuntia humifusa var. ammophila (1 revision)
- Bruchia flexuosa (1 revision)
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- Isocoma menziesii var. vernonioides (1 revision)
- Howelliella ovata (1 revision)
- ×elyhordeum arcuatum (1 revision)
- Erigeron reductus (1 revision)
- Sphagnum lescurii (1 revision)
- Parnassia (1 revision)
- Salix sect. Salix (1 revision)
- Crossidium aberrans (1 revision)
- Iris (sect. Limniris) ser. Californicae (1 revision)
- Cayaponia americana (1 revision)
- Madia citrigracilis (1 revision)
- Potentilla recta (1 revision)
- Ribes cereum var. colubrinum (1 revision)
- Frankenia palmeri (1 revision)
- Helianthus microcephalus (1 revision)
- Melica porteri (1 revision)
- Hesperidanthus linearifolius (1 revision)
- Ceanothus megacarpus var. megacarpus (1 revision)
- Batis (1 revision)
- Phyllodoce glanduliflora (1 revision)
- Arida parviflora (1 revision)
- Opuntia basilaris (1 revision)
- Condalia viridis (1 revision)
- Thurovia triflora (1 revision)
- Asplenium trichomanes (1 revision)
- Sphagnum henryense (1 revision)
- Eriogonum subg. Ganysma (1 revision)
- Munzothamnus (1 revision)
- Corispermum nitidum (1 revision)
- Stevia (1 revision)
- Eriogonum pulchrum (1 revision)
- Lepidium montanum (1 revision)
- Arctostaphylos nevadensis subsp. knightii (1 revision)
- Heuchera glomerulata (1 revision)
- Diapensia (1 revision)
- Heuchera grossulariifolia (1 revision)
- Agoseris glauca var. dasycephala (1 revision)
- Bulbostylis (1 revision)
- Sesleria nitida (1 revision)
- Digitalis purpurea (1 revision)
- Dudleya blochmaniae subsp. insularis (1 revision)
- Portulaca pilosa (1 revision)
- Eremothera refracta (1 revision)
- Secale (1 revision)
- Mentzelia humilis var. humilis (1 revision)
- Allium geyeri var. tenerum (1 revision)
- Cheilanthes horridula (1 revision)
- Sieversia (1 revision)
- Sida (1 revision)
- Hymenopappus flavescens (1 revision)
- Hemizonia congesta subsp. lutescens (1 revision)
- Calochortus kennedyi (1 revision)
- Phanerophlebia (1 revision)
- Pinus cembroides (1 revision)
- Panicum hirticaule (1 revision)
- Ptychostomum (1 revision)
- Equisetum hyemale (1 revision)
- Carsonia (1 revision)
- Danthonia unispicata (1 revision)
- Erigeron allocotus (1 revision)
- Carthamus leucocaulos (1 revision)
- Constancea (1 revision)
- Solidago ohioensis (1 revision)
- Crataegus egens (1 revision)
- Ranunculus pedatifidus (1 revision)
- Hypnum revolutum var. revolutum (1 revision)
- Halodule (1 revision)
- Lilium pardalinum subsp. pitkinense (1 revision)
- Erigeron uniflorus var. eriocephalus (1 revision)
- Brachytheciaceae Illustrations (1 revision)
- Arctostaphylos canescens subsp. sonomensis (1 revision)
- Maurandella (1 revision)
- Psilopilum (1 revision)
- Comarostaphylis diversifolia (1 revision)
- Rhizophoraceae Illustrations (1 revision)
- Senecio pattersonensis (1 revision)
- Psathyrotes annua (1 revision)
- Castilleja densiflora var. densiflora (1 revision)
- Eragrostis curvula (1 revision)
- Rosa sect. Bracteatae (1 revision)
- Bartramiaceae (1 revision)
- Brodiaea appendiculata (1 revision)
- Physaria pachyphylla (1 revision)
- Erigeron lackschewitzii (1 revision)
- Coreopsis nuecensis (1 revision)
- Penstemon acaulis (1 revision)
- Orthilia secunda (1 revision)
- Dicranocarpus parviflorus (1 revision)
- Sphaeralcea leptophylla (1 revision)
- Callirhoë triangulata (1 revision)
- Delphinium purpusii (1 revision)
- Sisymbrium erysimoides (1 revision)
- Delphinium variegatum subsp. thornei (1 revision)
- Vitis rotundifolia var. munsoniana (1 revision)
- Penstemon dasyphyllus (1 revision)
- Penstemon rubicundus (1 revision)
- Fagonia (1 revision)
- Pyrrocoma uniflora var. gossypina (1 revision)
- Senecio viscosus (1 revision)
- Erigeron eatonii var. villosus (1 revision)
- Equisetum hyemale subsp. affine (1 revision)
- Arabidopsis arenicola (1 revision)
- Salix elaeagnos (1 revision)
- Phytolacca americana (1 revision)
- Artemisia campestris subsp. caudata (1 revision)
- Neckera complanata (1 revision)
- Leersia monandra (1 revision)
- Talipariti (1 revision)
- Artemisia porteri (1 revision)
- Cotoneaster simonsii (1 revision)
- Penstemon eatonii var. undosus (1 revision)
- Micranthes micranthidifolia (1 revision)
- Triglochin (1 revision)
- Arenaria longipedunculata (1 revision)
- Abronia umbellata var. breviflora (1 revision)
- Elephantopus nudatus (1 revision)
- Crepis nana (1 revision)
- Erythranthe breweri (1 revision)
- Agalinis laxa (1 revision)
- Zigadenus exaltatus (1 revision)
- Cliftonia monophylla (1 revision)
- Sidalcea malviflora subsp. californica (1 revision)
- Boechera gunnisoniana (1 revision)
- Taraxacum phymatocarpum (1 revision)
- Fissidens (1 revision)
- Dryopteris ludoviciana (1 revision)
- Halesia diptera (1 revision)
- Lewisia triphylla (1 revision)
- Carex saxatilis (1 revision)
- Poa leptocoma (1 revision)
- Sphagnum (1 revision)
- Pellaea ternifolia subsp. villosa (1 revision)
- Balsamorhiza sagittata (1 revision)
- Amelanchier alnifolia var. alnifolia (1 revision)
- Thelypodiopsis vaseyi (1 revision)
- Niphotrichum canescens (1 revision)
- Pityopsis aspera var. aspera (1 revision)
- Pseudolycopodiella caroliniana (1 revision)
- Chrysothamnus greenei (1 revision)
- Tradescantia bracteata (1 revision)
- Cactaceae subfam. Pereskioideae (1 revision)
- Piperia elegans subsp. elegans (1 revision)
- Heterotheca oregona var. rudis (1 revision)
- Helminthotheca (1 revision)
- Croton californicus (1 revision)
- Marantaceae (1 revision)
- Melanthera angustifolia (1 revision)
- Horkelia congesta var. congesta (1 revision)
- Torreya (1 revision)
- Festuca rubra subsp. vallicola (1 revision)
- Euphorbia dendroides (1 revision)
- Amelanchier bartramiana (1 revision)
- Gemmabryum (1 revision)
- Leymus innovatus subsp. velutinus (1 revision)
- Agave americana var. americana (1 revision)
- Danthonia parryi (1 revision)
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- Erigeron flagellaris (1 revision)
- Mentzelia holmgreniorum (1 revision)
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- Atriplex elegans var. fasciculata (1 revision)
- Sedum sexangulare (1 revision)
- Microthlaspi (1 revision)
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- Sematophyllaceae Illustrations (1 revision)
- Rafinesquia neomexicana (1 revision)
- Schistidium strictum (1 revision)
- Potentilla flabellifolia (1 revision)
- Solidago uliginosa (1 revision)
- Pinaceae Illustrations (1 revision)
- Solidago nemoralis subsp. nemoralis (1 revision)
- Sclerolinon (1 revision)
- Physaria eburniflora (1 revision)
- Allium punctum (1 revision)
- Mentzelia humilis (1 revision)
- Braya humilis (1 revision)
- Shepherdia argentea (1 revision)
- Calliergon giganteum (1 revision)
- Anoda abutiloides (1 revision)
- Racopilaceae (1 revision)
- Bromus squarrosus (1 revision)
- Hibiscus syriacus (1 revision)
- Braya glabella subsp. prostrata (1 revision)
- Antennaria luzuloides (1 revision)
- Paronychia wilkinsonii (1 revision)
- Pohlia camptotrachela (1 revision)
- Dysphania ambrosioides (1 revision)
- Clarkia speciosa subsp. immaculata (1 revision)
- Gymnostomiella orcuttii (1 revision)
- Lipocarpha micrantha (1 revision)
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- Prosartes (1 revision)
- Minuartia rubella (1 revision)
- Schoenobryum (1 revision)
- Marah fabacea (1 revision)
- Botrychium lanceolatum subsp. lanceolatum (1 revision)
- Ceanothus purpureus (1 revision)
- Rhododendron macrophyllum (1 revision)
- Carex vesicaria (1 revision)
- Dactylorhiza majalis var. junialis (1 revision)
- Andreaea sinuosa (1 revision)
- Colubrina stricta (1 revision)
- Tradescantia crassifolia (1 revision)
- Oenothera triangulata (1 revision)
- Viola glabella (1 revision)
- Paronychia fastigiata var. pumila (1 revision)
- Lythrum californicum (1 revision)
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- Lorandersonia spathulata (1 revision)
- Hymenocallis henryae var. glaucifolia (1 revision)
- Picris hieracioides (1 revision)
- Opuntia ellisiana (1 revision)
- Alnus glutinosa (1 revision)
- Crocanthemum bicknellii (1 revision)
- Pohlia flexuosa (1 revision)
- Glyptopleura setulosa (1 revision)
- Tillandsia simulata (1 revision)
- Agalinis densiflora (1 revision)
- Sclerocactus glaucus (1 revision)
- Physaria (1 revision)
- Zephyranthes refugiensis (1 revision)
- Cleomella longipes (1 revision)
- Sagittaria demersa (1 revision)
- Draba breweri (1 revision)
- Poa sierrae (1 revision)
- Festuca rubra (1 revision)
- Delphinium menziesii subsp. pallidum (1 revision)
- Chaenactis douglasii var. alpina (1 revision)
- Horkelia cuneata var. sericea (1 revision)
- Malvella leprosa (1 revision)
- Brachythecium laetum (1 revision)
- Thelypteris ovata var. lindheimeri (1 revision)
- Ariocarpus fissuratus var. fissuratus (1 revision)
- Solidago subsect. Junceae (1 revision)
- Chenopodium urbicum (1 revision)
- Erigeron grandiflorus (1 revision)
- Coreopsis maritima (1 revision)
- Pyrrocoma clementis var. villosa (1 revision)
- Mentzelia marginata (1 revision)
- Stanleya pinnata (1 revision)
- Festuca subverticillata (1 revision)
- Symphyotrichum oolentangiense (1 revision)
- Chylismia claviformis subsp. peeblesii (1 revision)
- Muscari botryoides (1 revision)
- Eremochloa ciliaris (1 revision)
- Boerhavia pterocarpa (1 revision)
- Drymocallis deseretica (1 revision)
- Pseudocydonia (1 revision)
- Epilobium suffruticosum (1 revision)
- Seymeria pectinata subsp. peninsularis (1 revision)
- Weissia sharpii (1 revision)
- Nestotus macleanii (1 revision)
- Poa ×gaspensis (1 revision)
- Rubus bartonianus (1 revision)
- Plagiopus (1 revision)
- Delphinium nuttallianum (1 revision)
- Phyllanthus urinaria (1 revision)
- Buxbaumia (1 revision)
- Persicaria sect. Echinocaulon (1 revision)
- Sedella (1 revision)
- Achnatherum latiglume (1 revision)
- Volume 20 (1 revision)
- Clematis hirsutissima var. scottii (1 revision)
- Anemone parviflora (1 revision)
- Hypnum imponens (1 revision)
- Poa arida (1 revision)
- Ebenaceae Illustrations (1 revision)
- Artemisia campestris subsp. pacifica (1 revision)
- Ribes inerme var. inerme (1 revision)
- Carex bicolor (1 revision)
- Sarracenia rosea (1 revision)
- Gillenia (1 revision)
- Rhododendron viscosum (1 revision)
- Eriogonum deflexum var. baratum (1 revision)
- Warnstorfia pseudostraminea (1 revision)
- Neoholmgrenia hilgardii (1 revision)
- Amphidium (1 revision)
- Persicaria nepalensis (1 revision)
- Agalinis skinneriana (1 revision)
- Croton pottsii var. thermophilus (1 revision)
- Erigeron bigelovii (1 revision)
- Aristolochia coryi (1 revision)
- Carex sect. Physoglochin (1 revision)
- Rhynchospora megaplumosa (1 revision)
- Penstemon crandallii var. crandallii (1 revision)
- Pinus ponderosa var. ponderosa (1 revision)
- Viola umbraticola var. glaberrima (1 revision)
- Paronychia rugelii (1 revision)
- Calamagrostis koelerioides (1 revision)
- Epilobium septentrionale (1 revision)
- Meesia uliginosa (1 revision)
- Polytrichum commune var. commune (1 revision)
- Stanleya pinnata var. integrifolia (1 revision)
- Erigeron mancus (1 revision)
- Quercus grisea (1 revision)
- Mitella trifida (1 revision)
- Mielichhoferia (1 revision)
- Acanthoscyphus parishii var. abramsii (1 revision)
- Sesamum (1 revision)
- Scleropodium obtusifolium (1 revision)
- Helianthus deserticola (1 revision)
- Carex molesta (1 revision)