224 CRuciFERAE (mustard family) 



aureiformis Rydb. Bull. Torr. Bot. Club 28: 278. 1901; D. decumbens Rydb. 

 1. 0. 29: 240.) — Subalpine; New Mexico to British America. 



20. SMELOWSKIA C. A. Mey. 



Low eaespitose perennials with pinnatifid leaves and small flowers in ter- 

 minal racemes; pubescence simple or stellate. Sepals oblong, nearly equal 

 at base. Petals entire, obovate"', or spatulate.' SiUques lance-oblong, flattened 

 at right angles to the septum; the valves shajply keeled so that the silique 

 presents a 4-angled aspect; stigma sessile, or with short style. Seeds few. 



1. Smelowskia americana Rydb. Bull. Torr. Bot. Club 29: 239. 1902. 

 Densely eaespitose; caudex closely covered by the bases of ;bhe dead leayes: 

 leaves 2-5 cm. long, pinnately divided to the midrib into linear acute divi- 

 sions, finely stellate and the petioles cihate: stems about 1 cm. high, few- 

 leaved: inflorescence at first short and corymbiform, in fruit elongated: sepals 

 oblong, pubescent, about 3 mm. long: petals clawed, 5-6 mm. long, white 

 or pink, blades broadly spatulate: silique 11-12 mm. long and about 1 mm. 

 wi^le, tapering at both ends. S. calydna. {S. linearifolia Rydb. 1. c. 31: 555.) 

 — In the high mountains of our range. 



21, SOPHIA Adans. Tansy Mttstabd 



Annual or perennial herbs, with pinnatifid or dissected pub^cent or canes- 

 cent leaves, and small yellow flowers in crowded racemes which become 

 greatly elongated in fruit. Siliques linear or linear-oblong, on slender pedicels; 

 the valves 1-nerved. Seeds mmute, in 1 or 2 rows in each ceU.— Sisymbrium 

 in part. ' 



Herbage more or less pubescent but not cinereous-tomentulqse. 



Silique and pedicel erect or appreased, each less than 1 cmi, l6ng . 1. S. Hartwegians, 

 Silique and pedicel divergent or divaricate; silique-usuaUy 1 cm. or 

 more long. 

 Siliques ascending. 



Seeds in 1 row m each cell. ' '' '' 



Pedicels 10-20 mm. long, equaling or longer than the silique 2. S. fili^es. ■ ■ ' "' 

 Pedicels 4-8 mm. long, shorter than the sihque . . . 3. S. incisa.^ ■ 



Seeds in 2 rows , . . 4. S. pinnata, 



Silique and pedicel widely divaricate . . . , , . 5. S. leptophylla. 

 Herbage densely cinereous-tomentulose 6. S; ochroleuiQa. ' 



1. Sophia Hartwegiana (Foum.), Greene, Pitt. 3: 95. 1896. Slender or 

 often quite stout, erect, .2-5 dm. high, often' somewhat branched, glabrate, 

 granular-glandular, or glandular-pubescent: leaves pinnate; the leaflets, nar- 

 rowly oblong or lanceolate, obtuse: and obtusely or acutely toothed: siliques 

 short, 5-7 mm. long, crowded, erect; pedicels about as long as the silique, 

 suberect or more usually appressed: seeds uniseriate or more rarely irregularly 

 biseriate. (S. glanduWera Rydb. Bull. Torr. Bot. Club 28: 281. 1901.)— 

 From New Mexico to Montana and westward. 



2. Sophia filipes (Gray) Heller, BuU. Torr. Bot. Club ,24: 311. 1?97. 

 Erect, Blender or slenderly branched, 2-4 dm. liigh, usually finely pubescept 

 or glandular-pub erulent, light green (not canescent or tomentose): leiavfls 

 thin, pinnatifid or dissected; the upper less so, with segments nearly entire and 

 becoming elongated -linear: fruiting raceme open: sihques glabrous,, linear, 

 acute, ascending, 8-14 mm. long; pedicel fiUform, glabrous, widely spreading, 

 usually longer than the sihque: seeds in one row. — <3olorado to Oregon.. , 



3. Sophia incisa (Engelm.) Greene, Pitt. 3: 95. 1896. Much like the preced- 

 ing, green but often quite densely pubescent and more or less glandular: leaves 

 bipinnatifid or dissected; the segments oblong and incisely toothed or entire 

 and linear: the small flowers corymbose; the fruiting raceme long: sihques 

 acute, 5-10 mm. long, shghtly curved, ascending; pedicels slender, ; widely 

 spreading, either longer or shorter than the silique. Exceedingly yariablfi- 

 The following have recently been proposed as species, but they seem impo^bk 



