Nerisyrenia

Greene

Pittonia 4: 225. 1900.

Etymology: Greek neros, flowing, and genus Syrenia, presumably alluding to resemblance
Basionym: Greggia A. Gray Smithsonian Contr. Knowl. 3(5): 8, plate 1. 1852,
Treatment appears in FNA Volume 7. Treatment on page 609. Mentioned on page 235, 242, 610.
 TaxonIllustrator 
FNA7 P77 Nerisyrenia linearifolia.jpegPaysonia lasiocarpa
Paysonia lasiocarpa subsp. lasiocarpa
Paysonia lescurii
Paysonia perforata
Nerisyrenia linearifolia
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey
Yevonn Wilson-Ramsey

Perennials [subshrubs]; (caudex woody); not scapose; usually pubescent, sometimes glabrous or glabrate, trichomes long-stalked to subsessile, dendritic. Stems (few to several from base), erect to ascending, branched distally. Leaves cauline; not rosulate; petiolate or sessile; blade (often fleshy), margins entire, dentate, or repand, sometimes revolute. Racemes (corymbose, several-flowered, lax). Fruiting pedicels divaricate to ascending, or, rarely, recurved, slender. Flowers: sepals spreading to reflexed, oblong or lanceolate to ovate [linear]; petals usually white (often fading lavender), rarely lavender, obovate to spatulate [broadly elliptic], (longer than sepals), claw well-differentiated from blade, (dilated and denticulate basally); stamens slightly tetradynamous, (somewhat spreading); anthers linear, (base sagittate, apex obtuse); nectar glands confluent, subtending bases of stamens. Fruits siliques or silicles, sessile, linear to oblong [obovoid], smooth [torulose], straight or curved, angustiseptate, terete, [or latiseptate]; valves each with distinct midvein, pubescent [glabrous]; replum rounded; septum complete; ovules 30–100 per ovary; style distinct; stigma conical, 2-lobed (lobes connivent, decurrent). Seeds uniseriate or biseriate, plump, not winged, oblong [elliptic]; seed-coat mucilaginous when wetted; cotyledons incumbent. x = 9, 10

Distribution

s United States, n Mexico

Discussion

Species 7–9 (2 in the flora).

Parrasia Greene (1895), not Rafinesque (1837) is an illegitimate name, sometimes found in synonymy with Nerisyrenia.

Key

1 Leaf blades usually obovate to spatulate or oblanceolate, rarely elliptic, (4-)7-20(-30) mm wide, not fleshy. Nerisyrenia camporum
1 Leaf blades linear to linear-oblanceolate, 1-4.5 mm wide, fleshy. Nerisyrenia linearifolia

"elongated" is not a number."thick" is not a number.

... more about "Nerisyrenia"
Ihsan A. Al-Shehbaz +
Greene +
Greggia +
appendaged +  and unappendaged +
dissected +, repand +, sinuate +, crenate +  and dentate +
much smaller +  and reduced +
urceolate +, campanulate +  and tubular +
branched +  and simple +
subsessile +, sessile +  and petiolate +
well-developed +
distinct +
well-differentiated +
emarginate +  and entire +
incumbent +  and accumbent +
s United States +  and n Mexico +
straight +  and curved +
Greek neros, flowing, and genus Syrenia, presumably alluding to resemblance +
not winged +  and unappendaged +
connate +  and distinct +
actinomorphic +
curved +  and straight +
terete +, angustiseptate +, linear +  and oblong +
latiseptate +  and unsegmented +
angustiseptate +  and terete +
latiseptate +  and unsegmented +
angustiseptate +  and terete +
sessile +  and petiolate +
not rosulate +
connate +  and distinct +
decurrent +
repand;dentate;repand;dentate +
tenuinucellate +, crassinucellate +  and bitegmic +
campylotropous +  and anatropous +
rudimentary +
obovate +  and spatulate +
trinucleate +  and 3(-11)-colpate +
recurved +  and ascending +
slender +
bacon1978a +
mucilaginous +
biseriate +  and uniseriate +
not +  and mucilaginous +
white +, black +, brown +  and yellow +
persistent +  and caducous +
distinct +
spreading +  and reflexed +
lanceolate +  and ovate +
reduced +
curved +  and straight +
indehiscent +  and dehiscent +
terete +, angustiseptate +, linear +  and oblong +
curved +  and straight +
terete +, angustiseptate +, linear +  and oblong +
tetradynamous +
procumbent +  and decumbent +
erect +  and ascending +
2-lobed +  and conical +
subsessile +, sessile +  and petiolate +
persistent +
distinct +
Cruciferae +
Nerisyrenia +
Brassicaceae tribe Physarieae +
dendritic +, long-stalked +  and subsessile +
forked +  and scale-like +
coiled +, 1-7-veined +  and veined +
anastomosing +
glabrate +, glabrous +  and pubescent +
perennial +, biennial +  and annual +
aquatics +  and terrestrial +
glabrous +  and pubescent +