1 48 THE CACTACEAE. 



The 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 (Eaharrisia). 

 B. Plants erect. 



Hairs of the flower-areoles white. 

 Perianth-segments entire. 



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



Fruit yellow 1 . H. eriophora 



Fruit orange-red 2. H. fragrans 



Hairs of the flower-areoles few and short. 



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



Flower-buds pointed. 



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

 known 4. H. nashii 



Flower-buds ovoid, very long-pointed; fruit yellow 5. H. 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 1 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 9. H. aboriginum 



BB. Plants prostrate and pendent on rocks 10. H. earlel 



AA. Fruit red, often splitting (Eriocereus). 

 Joints aeveral-ribbed or subterete. 

 Ribs of the joints prominent. 

 Ribs not tubercled. 



Plants bright green 1 1 . H. torliwsa 



Plants bluish green 12. H. pomanensis 



Ribs of old joints strongly tubercled. 



Central spine 1, much longer than radial spines 13. H. marllnii 



Spines of nearly the same length 14. H. a&scendens 



Ribs of the joints low and broad 15. H. platygona 



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. //. guelichii 



