Flants Collected in Paraguay. 21 T 



the apex, narrowing and with the margins recurved at the base ; the blades 

 12-17 mm. long, 8-15 mm. broad, 3-nerved, the nerves obscure or obsolete 

 above, the midrib prominent below for the whole length of the blade, and the 

 lateral nerves distinct or obscure; petiole 1-3 mm. long, ancipital with the 

 decurrent midrib. Spikes solitary, axillary, 8-12 mm. long, bearing 3-4 

 verticils of flowers, the flowers 3 or 4 pistillate and 1 or 2 smaller staminate 

 in a verticil. Berries ovoid, verrucose, about 2 mm. long. The cataphyllary 

 sheaths slightly bifid, the teeth obtuse and ciliolate ; bracteal sheaths nearly 

 or quite truncate, not ciliolate. 



This species is apparently closely related to P. Ottonis, Eichler 

 (Flor. Bras., v, pt. 2, 119), but differs from it in several particulars, 

 and still more from P. emarginatam^ Mart., with which Eichler 

 associates P. Ottonis. 



Growing with no. 358 upon Piptadenia in the Gran Chaco, 

 opposite Asuncion (1582). December. 



EUPHORBIACE^. 

 Euphorbia heteropliylla, L., Sp. PL, 453. 



Pilcomayo River (867 and 1547). January. 



Growing on the carapo at a wood-cutting station on the lower 

 Pilcomayo, known as Obraje de Pedro Gill. Broad oval-shaped 

 leaves. 



Euphorbia pulcherrima (Graham), Willd. ; Boiss. in D.C. Prod., 



XV, pt. 2, 71. 



Asuncion (742). 



This fine plant is cultivated largely in the flower-gardens of 

 Paraguay. I do not think, however, that it grows wild in the 

 country. It is a native of Mexico and Central America. It is 

 conspicuous for the large showy red floral leaves, and sometimes 

 grows 2-^ m. high. It flowers nearly the entire year round. 



Euphorbia serpens, H. B. K., Nov. Gen., ii, 41. 



Pilcomayo River (8«1). January. = Balansa 1686. 



Euphorbia thyniifolia, L., Sp. PL, 454. 



Asuncion (64). November. 



A small spreading, prostrate plant, growing in grassy grounds. 

 Leaves opposite, oblong, obtuse, nearly or quite equilateral at the 

 base, 1-nerved, glabrous or puberulent, 5-7 ram. long; petioles 

 about 1 mm. long. Flowers minute ; glands 4, small, concave. 



