554 PATAGONIAN EXPEDITIONS I BOTANY. 



EUPHORBIA PORTULACOIDES GLABRA Phil. 



" In terris magellanicis." 



Spegazzini gives 3 forms : (a) obtusifolia, glabrous ; leaves obtuse, (b] 

 acutifolia, glabrous ; leaves acute, (c] bridgesi, hispidulose ; leaves 

 obtuse. 



3. E. PSEUDOPEPLUS Speg. 



( Tithymalus, galarrhcea, leiocarpa, subleiosperma.} 



Annual, the stem at the very base having 2 opposite, equi-long branches, 

 above this densely and alternately branching ; the branches and branch- 

 lets subappressed ; cauline leaves alternate, spatulate, subpetiolate, small, 

 caducous ; floral leaves larger, opposite, suborbicular, sessile. Umbels 

 2 5-rayed ; the rays 2 3-dichotomous. Flowers small, nearly sessile ; 

 lobes of the turbinate, membranaceous involucre minute, entire ; glands 

 ochroleucous, entire ; cocci of the capsule dorsally rounded ; seed ellipti- 

 cal, rugose-reticulate. Caruncle peltate, not depressed. 



In higher places along the Rio Negro, and Golfo de San Jorge. 



4. E. SERPENS Kth. 



Glabrous annual. Stems filiform, prostrate, branching. Leaves short- 

 petioled, from an unequally cordate base, ovate-orbiculate, entire, often 

 retuse. Stipules broad-triangular, toothed at apex Involucres solitary in 

 the upper axils, but approximate, as the internodes are short, 2-3-lobed, 

 with transverse oblong glands. Styles shortly bifid. Cocci keeled. 



(N. Amer., by Mexico to S. Am.) ; N. Patagon. It seems identical with 

 the Oriental E. screens indica Engelm. (DC. Prodr., xv, 2, p. 30). 



(Fig. in Brit. & Br, ii, p. 372.) 



3. DYSOPSIS Baill. 



Small, prostrate herb, with alternate, petiolate leaves, and small, axillary, 

 monoecious flowers (or terminally crowded); Calyx 3-cleft. Petals none. 

 Stamens 6, epicalycine, exsert, with versatile anthers. Ovary 3-celled ; 

 styles distinct, lanceolate, laciniate. Capstile tridymous, having small 

 seeds with narrow cotyledons. 



Only species : 



D. GLECHOMOIDES (Rich.) Mull. 



(D. gay ana Baill.) 



