542 PATAGONIAN EXPEDITIONS: BOTANY. 



13. OXALIS RUBRA St. Hil. 



Root tuberous, obovate. Leaves radical, trifoliolate. Leaflets obcor- 

 date, smooth, full of black dots. Scape smooth, bearing a simple, 6-12- 

 flowered umbel, with a short involucre. Flowers small, red ; petals entire. 

 Styles exceeding the stamens. Carpels 4-5-seeded. 



(Brazil) ; N. Patagon., by Rio Negro. 



14. O. SQUAMOSO-RADICOSA Steud. 



Rhizome soft-fleshy, covered by sublignescent scales. Stemless. 

 Leaves radical, on slender petioles, unifoliate (multifoliate?) spreading at 

 the apex. Leaflets less than 12, equal, linear, pubescent. Flower soli- 

 tary, with a small, ovate bract. Calyx-segments lanceolate, many times 

 shorter than the petals. 



Magellan, in meadows. 



15. O. STENOPHYLLA Speg. 



Root tuberous, obovate, its apex- many-headed ; the branches apically 

 obovate-scaly, rosulate-leafy. Leaves long-petioled, trifoliolate. Leaflets 

 cuneate, deeply bifid ; their segments linear-obtuse. Peduncles slender, 

 often exceeding the leaves, trichotomously umbellate. Flowers mid- 

 sized, pale lilac. 



N. Patagon., common by Rio Negro. 



1 6. O. VALDIVIENSIS Barn. 



Stem low, leafy. Petioles 8-14 cm., more or less hairy. Leaflets 3, 

 wide, obcordate, basicuneate. Scapes 8-25 cm., with many flowers on 5 

 mm. petioles. Sepals naked, obtuse ; petals 4 times as long. Style hairy. 

 Capsule-loculi 3~4-seeded. 



(Chilian) ; Chubut, near Cholila. 



O. VALDIVIENSIS HUMILIS Speg. 



Only 5-10 cm. high; leaves thickish, glabrous. Scapes scarcely 

 exceeding the leaves. 



Chubut, in dry places near Cholila. 



