Pennellia micrantha |
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mountain mock thelypody |
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Stems | simple or several from base, 2–12.3 dm, pubescent proximally, trichomes predominantly dendritic, mixed with simple and long-stalked, 2-rayed ones, glabrous or sparsely pubescent distally, trichomes dendritic. |
Basal leaves | caducous; petiole 0.5–4 cm; blade oblanceolate, (1–)3–5 cm × 6–34 mm, margins sinuate, lobed, dentate, or, rarely, subentire, surfaces pubescent, trichomes dendritic. |
Cauline leaves | (distal) subsessile; blade oblanceolate, 3–10 cm × 1–20 mm, surfaces glabrous or glabrate. |
Racemes | not secund, 1.5–6.7 dm in fruit. |
Flowers | sepals purple or green, broadly oblong, 2.7–4 × 1.2–2 mm; petals purplish apically, spatulate to oblanceolate, 1.5–4(–5) × 0.5–2.2 mm; filaments 0.9–2.6mm; anthers 1–1.2 mm. |
Fruiting pedicels | slightly erect to divaricate-ascending, straight, (3–)3.5–8.5(–11) mm. |
Fruits | erect to ascending, straight, (1.5–)2.2–5.8 cm × 0.6–1.8 mm, terete; valves glabrous or sparsely pubescent; septum transparent; ovules 90–140 per ovary; style obsolete to 0.5 mm. |
Seeds | biseriate or uniseriate, plump, not winged, oblong, 0.7–0.8 × 0.4–0.5 mm; seed coat mucilaginous when wetted; cotyledons incumbent. |
Pennellia micrantha |
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Phenology | Flowering Jun–Sep. |
Habitat | Pine-oak forests, open grasslands, rolling andesitic loam soils, among volcanic rocks, igneous cliffs |
Elevation | 1100-3600 m (3600-11800 ft) |
Distribution |
AZ; NM; TX; Mexico (Chihuahua, Coahuila, Distrito Federal, Durango, state of México, Michoacán, Querétaro, San Luis Potosí, Sonora)
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Source | FNA vol. 7, p. 560. |
Parent taxa | Brassicaceae > tribe Halimolobeae > Pennellia |
Sibling taxa | |
Synonyms | Streptanthus micranthus, Heterothrix micrantha, P. robinsonii, Thelypodium longifolium var. catalinense, Thelypodium micranthum |
Name authority | (A. Gray) Nieuwland: Amer. Midl. Naturalist 5: 224. (1918) |
Web links |