262 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



cavity. Staininodes none. Fructiferous perianths enlarged, dry or fleshy, 

 more or less adhering to the receptacle and to each other and inclosing the 

 rounded nutlets (achenes) ; pericarp crustaceous. Seed pendulous; episperm 

 membranous, brownish; albumen none; cotyledons thick and fleshy, similar in 

 size and shape, the radicle small and superior. 



Laticiferous trees. Leaves alternate, short-petiolate, often large, entire or 

 minutely denticulate, penninerve, deciduous; stipules ample, intrapetlolar, 

 caducous, connate into the form of a shell. 



Species about 10, following the foot of the mountains of the western side of 

 America from Mexico to Peru and Bolivia. 



DESCRIPTION OF SPECIES. 



KEY TO THE SPECIES. 



Leaves subemarginate, rounded, or subacute at base. 



Receptacles ovoid; fruits 3 to 5 in each receptacle 1. G.ulei. 



Receptacles flattened; fruits more than 5 in each re- 

 ceptacle. 

 Fruits free to the base, greenish and dry at 



maturity 2. C. fallax. 



Fruits more or less coalescent, the pericarp at 

 maturity an orange red, succulent pulp. 



Style very short ; stigmas cushion-shaped 3. G. ausiralis. 



Style long and slender; stigmas elongate, 



more or less twisted 4. G.daguensis. 



Leaves cordate or deeply emarginate at. base. 



Primary staminate inflorescence short-stipitate (stipe 

 not over 1 cm. long). 

 Complemental male inflorescence flabellate, open- 

 ing in a long slit. Style short, thick, and 

 hairy-spinescent ; stigmas long and twisted. 5. (\hictiflua. 

 Complemental male inflorescence clavate, with a 

 small, rounded opening. Style long, slender, 

 and smooth; stigmas short, flat, and pubes- 

 cent 0. 0. costaricana. 



Primary staminate inflorescence long-stipitate (stipe 

 over 1 cm. long). 

 Male receptacles in clusters of to 8 ; each open- 

 ing broadly by a slit; stipes long and slen- 

 der; style stiff-hairy at base 7. C. ffuatcmalemi.'!. 



Male receptacles in clusters of 4. 



Style long, slender, and smooth ; stigmas 

 rather small. Male receptacles regu- 

 larly flabellate 8. V. panamensis. 



Style short and thick, with large stigmas. 

 Lobes of male receptacles reflexed or 

 distorted at the time of flowering. 

 Lobes of the male receptacles opening to 

 a flat disk; interstaminate bract- 

 lets very few. Style glabrous 0. C. nicoyensis. 



Lobes of the male receptacle distorted- 

 reflexed ; interstaminate bractlets 

 numerous. Style sparsely hairy; 

 fruiting receptacles very large ^.10. C. clastica. 



