All Floras      Advanced Search
FNA Vol. 7 Page 729, 735 Login | eFloras Home | Help
FNA | Family List | FNA Vol. 7 | Brassicaceae | Thelypodium

8. Thelypodium laxiflorum Al-Shehbaz, Contr. Gray Herb. 204: 129, plate 22A. 1973.

Stanleyella wrightii (A. Gray) Rydberg var. tenella (M. E. Jones) Payson; Thelypodium wrightii A. Gray var. tenellum M. E. Jones

Biennials; somewhat glaucous, glabrous throughout or pubescent basally. Stems branched distally, (1.5-)3-14 (-23.5) dm, (glabrous throughout or sparsely to densely hirsute proximally). Basal leaves (and proximal cauline): petiole (1-)1.7-8 (-11) cm, pubescent or glabrous; blade oblanceolate in outline (lateral lobes usually oblong to linear, rarely deltate), (4-)7.2-20.5(-30) cm × (6-)10-40(-100) mm, margins pinnately lobed or lyrate (lobes entire or dentate). Cauline leaves petiolate; blade usually lanceolate to linear, sometimes oblanceolate to oblong, 1.5-7(-10) cm × 3-12(-20) mm, margins usually entire or repand, rarely lobed. Racemes corymbose, somewhat lax, considerably elongated in fruit. Fruiting pedicels often divaricate, sometimes reflexed, rarely horizontal or divaricate-ascending, straight, slender, (4-)5-13 (-19) mm, somewhat flattened at base. Flowers: sepals (equal), ascending, oblong, (2.5-)3-5(-5.5) × 1-1.7(-3) mm, (lateral pair not saccate); petals usually white, rarely lavender, usually spatulate, rarely obovate, 5-7.5(-9.5) × 1.5-2.5(-3.5) mm, margins not crisped, claw obscurely differentiated from blade (widest at base); nectar glands continuous, flat, subtending bases of stamens; filaments tetradynamous, median pairs 3-4.5(-5.5) mm, lateral pair 2.5-3.5(-4.5) mm; anthers included, oblong, (1-)1.5-2.2(-2.5) mm, not circinately coiled; gynophore 0.5-0.8(-1.5) mm. Fruits divaricate to reflexed, submoniliform to strongly torulose, straight or curved, terete, (2-)3-6.6(-7.4) cm × 0.7-1(-1.5) mm, (replum constricted between seeds); ovules 26-62 per ovary; style usually clavate to subclavate, rarely cylindrical, (0.5-)0.8-2(-5) mm. Seeds (oblong), (1-) 1.3-1.8(-2) × 0.5-1 mm.

Flowering May-Sep. Talus, rocky slopes, cliffs, pinyon-juniper-brush communities; 1500-3100 m; Colo., Nev., Utah.


Related Objects  
  • Distribution Map
  • Map

     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |