MACLOSKIE : ZYGOPHYLLACE^:. 545 



Species 6, Chili and Argentina. 

 (Fig. in Eng. & Prantl, iii, 4, p. 84.) 



BULNESIA RETAMA Griseb. 



Silky. Peduncles i -flowered. Leaflets 2-3 pairs, deciduous ; the inter- 

 nodes long. 



(Andes ; on dunes and in the campos of Catamarca) ; N. Patagon. 



2. LARREA Cav. 



Balsamifluous evergreen, odorous shrubs, with distichous, alternate, 

 nodose branches, and opposite, even-pinnate leaves (often a leaf, simple, 

 2-toothed) with persistent stipules. Peduncles interstipular, i -flowered. 

 Petals yellow, larger than sepals. Stamens 10, the filaments with a bifid, 

 basal scale. Ovary hairy, globose, 5-celled. fruit villous, 5-coccous. 



Species 4, Texas to S. Amer. 



1. L. AMEGHINOI Speg. 



Prostrate, diffuse shrub. Leaves pubescent, distichous, opposite, sessile, 

 subelliptical, inequilateral, odd-pinnately lobed ; the lobes only 12 on 

 each side, obtusish. Flowers short-pediceled, subsolitary at apex of 

 branches ; sepals subobovate, green with yellow border ; petals oblanceo- 

 late, orange. Carpels entire. 



Patagon., by Golfo de San Jorge ; Rio Chubut. 



2. L. DIVARICATA Cav. 



Leaves sessile, 2-lobed, villous, the lobes deep, lanceolate, divaricate. 

 Branches somewhat 4-angled ; leaf-scars conspicuous, sepals unequal, 

 yellowish. Ovary and fruit covered by long hairs. Perennial. 



(Argentina, called Jarrilla) ; Patagon., Chubut, in dry gravelly valleys. 



3. L. CUNEIFOLIA Cav. 



Leaves villous, simple, subsessile, cuneate, apically 2-lobed, the lobes 

 divaricate-acute, pinnately nerved, with a median seta. 



(Fig. in Eng. & Prantl, iii, 4, p. 86.) Argentina to N. Patagon., at con- 

 fluence of RR. Limay and Neuquen. 



