Pennellia longifolia |
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false thelododium, long-leaf mock thelypody |
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Stems | simple or few from base, 4–15 dm, pubescent proximally, trichomes simple and long-stalked, 2-rayed, mixed with smaller, dendritic ones. |
Basal leaves | caducous; petiole to 3 cm; blade spatulate to oblanceolate, 1.8–3 cm × 2–4 mm, margins dentate, sinuate, incised, or runcinate, surfaces pubescent, trichomes stalked, forked and dendritic, mixed with fewer, simple ones. |
Cauline leaves | (distal) sessile; blade linear, 3–9.2 cm × 0.8–5 mm, surfaces glabrous or glabrate. |
Racemes | secund, 1.6–7.9dm in fruit. |
Flowers | (slightly zygomorphic, receptacle asymmetric); sepals purple or green, oblong, 4–9 × 1.5–4 mm, (adaxial largest); petals lavender to purple apically, spatulate, (4–)5–7(–12) × 1–3 mm, (adaxial largest); filaments 4–9 mm; anthers 1–1.2(–2) mm. |
Fruiting pedicels | slightly descending, recurved, 5–13 mm. |
Fruits | pendent, straight or nearly so, 5–10 cm × 1–1.2 mm, slightly latiseptate; valves glabrous; septum transparent; ovules 150–250 per ovary; style 0.5–1.2 mm. |
Seeds | biseriate, plump, not winged, oblong, 0.7–1.3x 0.4–0.5 mm; seed coat mucilaginous when wetted; cotyledons incumbent. |
2n | = 16. |
Pennellia longifolia |
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Phenology | Flowering Jul–Oct. |
Habitat | Mixed pine-oak forest, limestone hills, rocky outcrops and meadows, stream banks, shaded ravines |
Elevation | 1400-3400 m (4600-11200 ft) |
Distribution |
AZ; NM; TX; Mexico; Central America (Costa Rica, Guatemala)
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Source | FNA vol. 7, p. 560. |
Parent taxa | Brassicaceae > tribe Halimolobeae > Pennellia |
Sibling taxa | |
Synonyms | Streptanthus longifolius, Heterothrix longifolia, Lamprophragma longifolium, P. hunnewellii, P. mcvaughii, Thelypodium anisopetalum, Thelypodium longifolium |
Name authority | (Bentham) Rollins: Rhodora 62: 16. (1960) |
Web links |