Pennellia longifolia

(Bentham) Rollins

Rhodora 62: 16. 1960.

Basionym: Streptanthus longifolius Bentham Pl. Hartw., 10. 1839
Synonyms: Heterothrix longifolia (Bentham) Rydberg Lamprophragma longifolium (Bentham) O. E. Schulz Pennellia hunnewellii Rollins Pennellia mcvaughii Rollins Thelypodium anisopetalum Greene Thelypodium longifolium (Bentham) S. Watson
Treatment appears in FNA Volume 7. Treatment on page 560.

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. Fruiting pedicels slightly descending, recurved, 5–13 mm. 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. 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, 0.7–1.3× 0.4–0.5 mm; seed coat mucilaginous when wetted; cotyledons incumbent. 2n = 16.

Phenology: Flowering Jul–Oct.
Habitat: Mixed pine-oak forest, limestone hills, rocky outcrops and meadows, stream banks, shaded ravines
Elevation: 1400-3400 m


V7 900-distribution-map.gif

Ariz., N.Mex., Tex., Mexico, Central America (Costa Rica, Guatemala).


Selected References


Lower Taxa

... more about "Pennellia longifolia"
Sara Fuentes-Soriano +  and Ihsan A. Al-Shehbaz +
(Bentham) Rollins +
Streptanthus longifolius +
Ariz. +, N.Mex. +, Tex. +, Mexico +, Central America (Costa Rica +  and Guatemala). +
1400-3400 m +
Mixed pine-oak forest, limestone hills, rocky outcrops and meadows, stream banks, shaded ravines +
Flowering Jul–Oct. +
Heterothrix longifolia +, Lamprophragma longifolium +, Pennellia hunnewellii +, Pennellia mcvaughii +, Thelypodium anisopetalum +  and Thelypodium longifolium +
Pennellia longifolia +
Pennellia +
species +