semi-open, or closed; tepals ± monomorphic, outer tepals equaling or somewhat larger than inner, (dimorphic, with outer tepals shorter than inner in P. heterosepalum)
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elliptic, lanceolate, or oblong (basal and cauline, basal usually notably larger than cauline, cauline mostly sessile) Wyethia 14 Leaves mostly orbiculate
21 KB (800 words) - 22:59, 29 July 2020
throats, lobes 5, deltate to lance-deltate or lanceolate (± equal [outer larger, e.g., some plants of Tridax]); anther thecae pale or slightly darkened;
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acrocarpous, large. Stems stiff, erect, mostly unbranched, in cross-section with a cortical region of small, thick-walled cells, a parenchyma of larger, thin-walled
7 KB (298 words) - 06:46, 30 July 2020
adaxially); sepals deciduous, distinct, equal; petals unequal (adaxial pair larger); stamens 8–32; filaments inserted on gynophore, (unequal), glabrous; anthers
6 KB (350 words) - 12:06, 30 July 2020
sometimes semi-open; tepals ± monomorphic, outer tepals equaling or somewhat larger than inner, apices of outer tepals rounded; anthers whitish yellow. Achenes
13 KB (1,076 words) - 10:08, 30 July 2020
venation reticulate, without included veinlets; distal leaves fertile, larger than sterile leaves; segments revolute, covering sporangia. Sporangia abaxial
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enclosed in short-shoots with small leaves (bracts). Perichaetial leaves often larger and more variable in shape than stem-leaves, sometimes broadly ovate to
8 KB (507 words) - 06:52, 30 July 2020
perigonial and perichaetial leaves not much differentiated, outer leaves larger, inner leaves smaller than leaves of innovations. Seta usually single, straight
12 KB (668 words) - 07:35, 30 July 2020
World Cirsium species was greatly affected by the events of the Quaternary. Large areas were glaciated and other areas were vastly different during glacial
60 KB (2,205 words) - 13:43, 10 February 2021
differentiated into outer layer of smaller, thick-walled cells and cortex of larger thin-walled cells, sometimes with small central cells, these often with
8 KB (580 words) - 06:43, 30 July 2020
puberulent; larger leaves 8–14 cm, sparsely puberulent; petiolules 1.5–3 mm, wrinkled, ± puberulent; leaflets 5–11, ovate to narrowly elliptic, larger 6–12.5
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265, 266, 286, 294, 306, 615. Plants acrocarpous or cladocarpous, small to large, usually olivaceous to blackish green, growing in rigid cushions, tufts,
13 KB (824 words) - 06:47, 30 July 2020
the calyptra sparsely ciliate to smooth. Spores minute and echinulate, or larger and finely papillose. Nearly worldwide Genera 22, species ca. 260 (9 genera
18 KB (1,106 words) - 06:45, 30 July 2020
biennials, or perennials; pubescent, trichomes branched, or mixed with simple, larger ones. Stems decumbent to procumbent, (slender), 1–5 dm. Basal leaves: blade
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Inflorescences terminal and/or axillary, cyme pairs (often aggregated into larger spikelike or paniclelike units), cymes sessile, umbellike, contracted, subtended
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urn, globose to turbinate, sometimes umbrelliform, elongate, usually much larger, wider than urn; annulus absent; operculum conic to hemispheric, blunt to
8 KB (478 words) - 07:34, 30 July 2020
reduced, sometimes ciliolate, inner tepals often much larger and ligulate, sometimes only slightly larger and broadly obtuse, innermost often reduced, sometimes
4 KB (298 words) - 08:28, 30 July 2020
University of Michigan Branches spreading. Leaf-blades elliptic or ovate, larger blades 10–16 × 4–7 (–9.5) cm, base cuneate, apex acuminate, abaxial surface
4 KB (452 words) - 18:33, 29 July 2020
or distinct and/or free; petals 3, median petal modified as lip, commonly larger or differing in form and color, lateral petals commonly but not always similar
41 KB (2,210 words) - 05:19, 30 July 2020