MACLOSKIE: LEGUMINOS/E. 491 



pairs, oblong. Peduncles exceeding the leaves. Heads globose. Flow- 

 ers greenish. Calyx minutely 4-toothed. Petals long, glabrous. Sta- 

 mens 10. Ovary villous. Pod lomentaceous, at length articulately 

 deciduous. 



N. Patagon., by Rio Negro. 



8. PROSOPIS STROMBULIFERA Benth. 



Glabrous. With stipular spines, or unarmed. Leaflets of pinnae 4-6 

 pairs, alternate or opposite, linear, obtuse ; a gland between some of the 

 pinnae. Legume terete, spirally contorted. (Fig. 59, A, B, in Eng. & 

 Prantl, iii, 3, p. 104.) 



(Peru ; Chili. Cultivated in gardens as medicine for tooth-ache. " Re- 

 torturio.") N. Patagon., by Rio Negro. 



Subfamily //. C&SALPINE&. 

 3. CASSIA Linn. 



Leaves equally pinnate. Calyx-tube very short, its lobes subequal, 

 imbricate. Corolla nearly regular, mostly yellow. Stamens 10 or 5, 

 unequal ; anthers opening by pores. Seeds numerous. 



Species 275, mostly in warm and temperate regions. 



KEY TO THE SPECIES. 



a. Leafless. aphylla. 



a2. Leaflets 3-6 pairs ; and 



b. Oval, acute. glauca. 



b2. Broad-ovate, retuse. lorentzii. 



b$. Cuneate-obovate, retuse. amottiana. 



I. C. APHYLLA Cav. 



Fruticose, branches dichotomous, terete, glabrous, leafless, nearly a 

 meter high. Branches rather thick, greenish-yellow. Flowers in terminal 

 racemes, alternately paired, on separate pedicels. Calyx-leaves ovate, 3 

 outer pilose. Corolla saffron, twice as long as the calyx ; petals ovate. 

 Pod flat, linear, 10 cm. long, 3 mm. broad. Seeds numerous, on capillary 

 funicles. 



(Argentina) ; Patagon., shrubberies, "an important occupant of the 

 fields of Patagonia, as well as on the mountains." 



