MUSTARD FAMILY 109 



Pods divergent: raceme lax. 8. T. leptosepalum. 



Pods erect; raceme dense. 9. T. milleflorum. 



Petals spatulate; pods reflexed; raceme lax. 10. T. utahense. 



52. PLEUROPHRAGMA Rydb. 



Pedicels not flattened, about 1 cm. long. 



Stipe 0.5-1 mm. long; inflorescence short. 1. P. integrifoHum. 



Stipe 2-3 mm. long; inflorescence elongate. 2. P. gracilipes. 



Pedicels flattened at the base, about 3 mm. long; stipe 1-2 mm. long. 



3. P. platypodum. 



53. STANLEYELLA Rydb. l. S. Wrightii. 



54. STANLEYA Nutt. Prince's Plume. 



Middle cauline leaves sessile by an auriculate base. 



Stem winged; petals greenish. 1. S. viridiflora. 



Stem not winged; petals yellow. 2. S. confertiflora. 



Middle cauline leaves petioled or sessile with a narrowed base. 



Plant wliite- villous. 3. S. tornentosa. 



Plant not wliite-villous. 



Blades of the petals linear-oblong to elliptic, bright yellow. 



Blades of the petals one-third to two-tliirds as long as the claws. 

 Pod arcuate, not tortuose. 

 Leaves sparingly hirsute. 



Filaments hairy; lower leaves pinnatifld, with lanceolate or oblong 



lobes. 4. S. pinnata. 



Filaments glabrous; lower leaves runcinate, with triangular lobes. 



5. S. runcinata. 

 Leaves glabrous. 7. S. glauca. 



Pod decidedly tortuose. 6. S. bipinnata. 



Blades of the petals as long as the claws. 

 Leaves glabrous. 



Leaves broadly lanceolate, the lower with short broad lobes; blades 

 of the petals oblong; pod ascending. 8. S. integrifolia. 



Leaves linear-lanceolate, usually all entire ; blades of the petals broadly 

 elUptic; pod recurved. 9. S. arcuata. 



Leaves finely puberulent. 10. S. canescens. 



Blades of the petals rounded-oval, ochroleucous. 11. S. albescens. 



F.\MiLY 53. C APP ARID ACE AE. C.\per Family. 



Pods elongate, linear; receptacle with an appendage or gland. 



Appendages tubular; petals cuneate-flabelliform, laciniate, very unequal. 



1. Cristatell,\ . 

 Appendages solid; petals entire, emarginate or 3-toothed, but not laciniate. 



Stamens 12-32; capsule sessile or short-stipitate. 2. J.\cksoni.\. 



Stamens 6; capsule long-stipitate. 3. Peritom.\. 



Pods short; receptacle without appendages. 



Pod oblong, flattened parallelly to the replum. 4. Celome. 



Pod broader than long, more or less flattened contrary to the replum. 



5. Cleomell.\. 



1. CRISTATELLA Nutt. l. C. Jamesii. 



2. JACKSONIA Raf. Clammy-weed. l. J. trachyspemm. 



3. PERITOMA DC. Bee Flower, Indian Pink, Stink Flower. 

 Petals yellow. 1. P. luteum. 

 Petals purple, pink, or white. 



Petals 8-12 mm. long, usually 3-toothed. 

 Stamens exserted. 



Pods 2.5-5 cm. long, broadly linear ; calyx-lobes lanceolate to ovate, longer than 



broad. 2. P. serrulatum. 



Pods 6-7 cm. long, narrowly linear; calyx-lobes broadly triangular, abruptly 



acuminate, broader than long. 3. P. anguslum. 



Stamens included. 4. P. inornatum. 



Petals about 4 mm. long, entire. ,5. P. Sonorae. 



4. CELOME Greene. l. C. platycarpa. 



5. CLEOMELLA DC. 



stipe longer than the pod; leaflets linear to oblong. 



Seeds rugose or tessellate; leaflets Unear; pod rhombic. 



Petals 3-5 mm. long; pod about 6 mm. wide; seed transversely rugose. 



1. C. angustifolia. 

 Petals 2-3 mm. long; pod 3-4 mm. wide; seed tessellate. 2. C. plocosperma. 



Seeds smooth and unmarked. 



Pod broadly rhombic; leaflets oblong or oblanceolate. 



Stem 2-3 dm. high; pod with sharp angles. 3. C. cornuta. 



