1.JS 



TIIIv CACTACKAK. 



Tlic vegetative characters of the first 9 species here recognized, natives of Florida and 

 the West Indies, are very much alike; their showy yellow or orange-red fruits are edible. 

 The young stem-areoles are subtended by subulate small deciduous leaves in several species. 





FIG. 215. Harrisia eriophora. 



KEY TO SPECIES. 



A. Fruit yellow or orange-red, not splitting (Euliarrisia). 

 B. Plants erect. 



Hairs of the flower-areoles white. 

 Perianth-segments entire. 



Hairs of the flower-areoles copious, j to 1.5 cm. long. 



Fruit yellow i . H. criophora 



Fruit orange-red 2. //. fragrans 



Hairs of the flower-areoles few and short. 



Flower-buds depressed-truncate; fruit yellow 3. H. porloricensis 



Flower-buds pointed. 



Flower-buds obovoid, short-pointed; color of fruit un- 

 known 4. //. tniihii 



Flower-buds ovoid, very long-pointed; fruit yellow 5. //. brookii 



Perianth-segments denticulate. 



Fruit yellow 6. H. gracilis 



Fruit orange-red 7. H. simpsonii 



Hairs of the flower-areoles tawny or brown. 



Hairs of the flower-areoles i to 1.5 cm. long; color of fruit unknown; 



spines up to 6 cm. long 8. H. fernowl 



Hairs of flower-areoles 7 mm. long or less; fruit yellow; spines much 



shorter g. //. aboriginum 



BB. Plants prostrate and pendent on rocks 10. //. carlci 



A A. Fruit red, often splitting (Eriocereus). 

 Joints several-ribbed or subterete. 

 Ribs of the joints prominent. 

 Ribs not tubercled. 



Plants bright green 1 1 . H. tortuosa 



Plants bluish green 12. H. pomanensis 



Ribs of old joints strongly tubercled. 



Central spine i, much longer than radial spines 13. //. niarlinii 



Spines of nearly the same length 14. H. adscendens 



Ribs of the joints low and broad 15. //. platvgona 



Joints 3 to s-angled. 



Scales of the perianth-tube copiously woolly in the axils 16. H. bonplandii 



Scales of the perianth-tube scarcely woolly in the axils 17. //. giidicliii 



