Pennellia longifolia (Benth.) Rollins
Family: Brassicaceae
longleaf mock thelypody,  more...
[Pennellia mcvaughii ,  more]
Pennellia longifolia image
Max Licher  
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, 1.6-7.9 dm 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. Flowering Jul-Oct. Mixed pine-oak forest, limestone hills, rocky outcrops and meadows, stream banks, shaded ravines; 1400-3400 m; Ariz., N.Mex., Tex.; Mexico; Central America (Costa Rica, Guatemala).
Martin and Hutchins 1980, Kearney and Peebles 1969
Duration: Perennial Nativity: Native Lifeform: Forb/Herb General: Biennial with stellate-pubescent stems, bearing forked hairs, or glabrous, 30-80 cm tall. Leaves: Basal leaves oblanceolate, sinuate toothed to pinnatifid, stellate-pubescent, cauline leaves linear to linear-lanceolate, entire, usually glabrous. Flowers: Borne in elongated racemes, purplish sepals, 4-5 mm long, glabrous or pubescent, somewhat oblique, lower sepals longer than the upper ones, petals spatulate, indistinctly clawed, 5-8 mm long, purple. Fruits: Siliques slender, terete, sessile, 50-70 mm long, widely spreading and pendulous. Ecology: Found on both damp and dry slopes from 5,500-9,500 ft (1676-2896 m); flowers July-September. Notes: Similar to Arabis when it is only a basal rosette, but since it is a biennial the rosette is not persistent when in flower which helps to distinguish Pennellia in the field. Ethnobotany: Unknown Etymology: Pennellia is named for the American botanist Francis Whittier Pennell (1886-1952), while longifolia means long leaved. Synonyms: Streptanthus longifolius, Thelypodium longifolium Editor: SBuckley, 2010
Pennellia longifolia image
Max Licher  
Pennellia longifolia image
Max Licher  
Pennellia longifolia image
Patrick Alexander  
Pennellia longifolia image
Patrick Alexander  
Pennellia longifolia image
Patrick Alexander  
Pennellia longifolia image
Patrick Alexander  
Pennellia longifolia image
Jillian Cowles  
Pennellia longifolia image
Jillian Cowles  
Pennellia longifolia image
Jillian Cowles  
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Liz Makings  
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Pennellia longifolia image
Kirstin Phillips  
Pennellia longifolia image