13% 
31 
radialibus 40-50 stellatis, centrali unico Jongiore robustiore ; flore 
flavo breviusculo; bacca aculeatissima ; seminibus magnis lucidis. 
On hills near San Diego, California, growing in thick patches. — 
Stems several feet long; branches 6-9 inches high, 1} inches in 
diameter. Fruit very spinose, with seeds over one line in length. 
27. C. varraBiLis, Pfeiff.: erectus, 3-4 angulatus ; areolis remo- 
tis; aculeis 4 ~ 6 brevibus radiantibus, 2-4 interioribus validis elon- 
gatis inequalibus divaricatis, centrali deflexo ; flore magno albo noc- 
turno ; bacca coccinea aculeolata ; seminibus magnis levibus. 
On the lower Rio Grande: fl. in May and June. — Well known 
from all parts of tropical America. Fruit 3 to 10 feet high, 2 inches 
in diameter; larger spines 12-18 lines long. Fruit 2-3 inches 
long, nearly 2 inches in diameter. 
28. C. Greeet, E. in Wisl. Rep. : ‘gracilis, e radice crassa napi- 
formi erectus ; ramis 3—6-angulatis, rufescentibus ; areolis confertis ; 
aculeis e basi bulbosa abrupte subulatis brevissimis nigricantibus, ra- 
dialibus 6-9, centralibus 1-2; floris elongati albidi tubo aculeolis 
capillaceis flexuosis munito ; 7 bacca sessili obovata apice rostrata ; 
seminibus rugosis. <2, Pets Os eae [850 
Var. a. CISMONTANUS: areolis elongatis; petalis latioribus. 
Var. 8. TRANSMONTANUS: areolis ovato-orbiculatis ; petalis angusti- 
oribus. 
From Western Texas to Sonora, and south to Chihuahua: fl. May 
and June. — Root a large fleshy tuber, sometimes 6 inches in diame- 
ter. Stems 2-3 feet high, 9-12 lines thick, usually 4- or 5-angled ; 
spines $— 1 line long, very sharp; lower ones longer. Flower 6 or 
8 inches long, 2—23 wide. Fruit 1-1} inches long. Seed 14-1} 
lines long. 
Subgen. 3. Leprpocerevs. Caulis elongatus: fasciculi aculeo- 
rum steriles et florigeri similes: floris tubus brevior squamosus : 
phylla numerosissima: stigmata pallida: semina levia: embryo ha- 
matus. 
29. C. cicantEvs, E. in Emory’s Rep. 1848: erectus, elatus, 
parce erecto-ramosus, 18~—2l-costatus; aculeis 12-16 radialibus 
inzequalibus, centralibus sub-6 robustis basi bulbosis corneis basi nigris 
ceteros superantibus, infimo longiore deflexo ; floribus subterminalibus 
albidis ; bacca obovata demum 3 — 4-valvi. 
From the Lower Gila north to Williams’s River (better known 
