76 CRUCIFER/E. Strepta^thus. 



pair of the longer stamens sometimes united) : anthers linear. — Annual or 

 biennial (rarely perennial?) herbs, with purple, rarely yellowish or white 

 flowers. 



§ 1. Limb of the petals broad : calyx slightly spreading. 



1. .S^. obtKsifoI ius (HooV.) : leaves elliptical, obtuse, deeply 2-lobed and clasp- 

 ing at the base ; petals broadly obovate ; siliques broadly linear.— Hook. bot. 

 mag. t. 3317. Brassica Wasliitana, Muhl. cat. p. 63 ? Stanleya Washitana, 

 DC.syst. 2. p. 512? 



Hot springs of Arkansas, Mr. Sabine, (v. s. cult, ex hort. Short.) — (I) 

 Whole plant smooth and glaucous. Stem tall. Leaves 4-5 inches long and 

 H-3 inches broad, appearing ahnost perfoliate from the deep closed sinus at 

 the base. Flowers large and very shoAvy. Limb of the petals nearly as broad 

 as long, fine rose-color, with a very deep purple spot in the centre. Siliques 

 4 inches long, pointed with the short style. 



2. S. maculatus (Nutt.) : leaves ovate-oblong, the leaves broad and clasp- 

 ing, entire, or minutely and remotely repand-denticulate ; petals obovate (pur- 

 ple) ; siliques somewhat 4-sided. — NiUt. ! in jour. acad. Philad.5. p. 134. t.T. 



On rocks, Arkansas, Nuttali ; near St. Augustine, Texas, Z>r. Learen- 

 worth! April-May.—® Stem li-2 feet high, sometimes much taller, usual- 

 ly simple, but often branched, glabrous and glaucous, terete. Leaves 3-6 

 inches long, IJ inch broad, glaucous, rather acute. Flowers in simple or 

 paniculate'racemes, very showy. Pedicels 3-4 inches long, spreading. Ca- 

 lyx purplish. Petals deep purple in the middle with a velvety appearance, 

 lighter towards the crenulate edge ; claw longer than the limb. Anthers about 

 2 Unes long, curved in drying: filament straight, as long as the anther. '' Si- 

 lique 4-5 inches long, erect, linear, compressed and somewhat quadrangular." 

 Nutt. 



3. S. sagittatus (Nutt.) : leaves oblong, acute, sagittate and clasping, en- 

 tire ; petals oblong-ovate (not spotted). Nutt. ! in jour. acad. Philad. 7. 

 p. 12. 



Sourcesof the Oiegon, Mr. Wyeth! June. — (7) Smooth, branched above. 

 Leaves smooth and apparently somewhat glaucous beneath. Raceme many- 

 flowered. Pedicels half an inch long. Flowers lilac-red : claws of the petals 

 very long, exserted. " Allied to S. obtusifolius, Hook., but with the lower 

 leaves entire, not "lyrate-pinnatifid." Nutt. 



4. S. angustifolius (Nutt. ! mss.) : " radical leaves lanceolate-linear, 

 sparingly hirsute ; cauline oblong-lanceolate, sagittate and clasping, smooth, 

 erect ; petals oblong-oval (rose-color), the limb exserted. 



" Rocky Mountains, towards the sources of the Platte.— (2) Radical leaves 

 tufted, more or less hirsute, the hairs centrally affixed. Stems several from 

 one root, 12-18 inches high, virgate, a little branching near the summit. 

 Lower stem-leaves much broader than the radical ones, closely amplexicaul, 

 becoming much smaller above ; the longest scarcely an inch in length. — 

 Flowers small, pale-red. Sepals short, smooth, almost coriaceous. Petals 

 obtuse ; the claws somewhat contorted, extending (as well as the stamens) 

 beyond the calyx." — Nutt. 



5. S. vdrgatus (Nutt. ! mss.) : radical leaves (and lower part of the 

 stem) more or less villous with stellate hairs, lanceolate-linear ; cauline ones 

 oblong-linear, sagittate, clasping ; petals exserted, linear-oblong ; calyx pu- 

 bescent. 



" With the preceding, and greatly resembling it ; but differing in the nar- 

 row petals and stellate pubescence." Nutt. 



