448 PATAGONIAN EXPEDITIONS I BOTANY. 



2. SOPHIA DESERTICOLA (Speg. sub Sisymbrium}. 



Stem prostrate, creeping, 2-8 cm. long, woody, branching apically. 

 Leaves densely rosulate on the branchlets, pinnately lobed or cleft, hoary- 

 tomentose, the hairs all stellate. Flowers 2 or many, arising from the 

 rosules, the pedicels i -flowered, shorter than the leaves. Sepals green, 

 sparsely pilose, equalling the white petals. Siliques cylindraceous, glab- 

 rous. Style long. (Allied to 5". canescens, but the structure of leaves 

 and flowers and the persistent caudex are distinctive. Speg.) 



Patagon., by Port Rawson ; in dry places between S. Julian and Rio 

 Deseado. 



3. S. GLABRESCENS Speg. 



Green slender annual. Stems and branches glabrous, glandulose up- 

 wards. Leaves bipinnatifid, their lobes minute, obovate, obtuse ; with 

 few, minute, stellate hairs. Petals ochroleucous, smaller than the sepals. 

 Silique glabrous with subsessile style. Pedicels glabrous, 2-3 times 

 shorter than the flowers. Pubescence glandular on the stem ; stellate on 

 the leaves. 



Patagon., by R. Sta. Cruz; Port Rawson, by Rio Negro. 



4. S. GLANDULIFERA Speg. 



Slender annual, with glandular-capitate hairs. Leaves twice pinnatifid. 

 Petals yellow, longer than the sepals. Siliques glabrous, 2-3 times 

 longer than the pedicels, and crowned by the subsessile styles (any 

 stellate pubescence?). 



S. Patagon., in fields by Rio Chico de Sta. Cruz. 



5- S. GLAUCESCENS (Phil.).- 



Seagreen perennial, covered with short villi. Leaves sparsely covered 

 with only stellate hairs, bipinnatifid, the segments 1.5-2 mm. broad, 

 apically lobulated. Pedicels and sepals glandular-hairy. Calyx scarcely 

 2 mm. long, equal to the petals. Siliques spreading, coriaceous, 2-3 times 

 as long as the peduncles. 



Patagon., by Teka-choique. 



6. S. HETEROTRICHA (Speg. sub Descurainea}. 



Simple erect annual, 25-50 cm. high. Stem terete, all hispid-glandu- 

 lar. Leaves erect, appressed, lanceolate, pinnately parted, 5-9 pairs of 



