278 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Complements] male inflorescence not represented in the material; according 

 to Cervantes's picture of the plant, receptacles elavate with an elongated stipe. 



Receptacles of the pistillate inflorescence sessile or subsessile, covered outside 

 with thick, gibbose, ovate-acuminate or lanceolate-acuminate scales, more or 

 less free at the tips. Perianths adnate for their lower Lin If, the free part 

 velvety without and divided at the top into 3 or 4 lobules. Style very short (O.S 

 to 1.5 mm.), thick, sparsely hairy; stigmas 2, 3, or 5, broadly lanceolate, 3 to 4 

 nun. long, smooth or sparsely hairy outside and with a papillose, purple, stigma tic- 

 surface. 



Fruiting receptacles large (4 cm^ and more in diameter), distorted, partly 

 reflexed, and often embracing the contiguous twig. Stipes nearly 1 on. long 

 or less, covered with velvety, thick, oblong-lanceolate bracts. Achenia 35 to 45 

 in each receptacle, their free upper half 1.5 to 2 cm. long, large, rounded, 3 to 4- 

 grooved, fleshy and brick red when quite ripe, depressed at tip. Seeds more or 

 less regularly ovoid, 9.0 to 10 mm. long, 0.2 to 6.S mm .in diameter, " testa white 

 and papery, cotyledons thick, piano-convex, radicle minute, superior (Hooker)." 



Mexico: Motzorongo, Veracruz, Cook, flowers and fruits, May, 1905 (U. S. 

 National Herbarium nos. 615100-102; alcoholic materials) ; Coahuayula, Mlchoa- 

 can, Emrick 2, 20, only leaves, probably from young trees, the identification 

 doubtful (Herbarium Field Museum nos. 95402 and 95480) ; scattered in the 

 bottoms around Wartemberg, near Tantoyuca, Iluasteca, Veracruz, Ervcndberg 

 371, 1858, leaves and young fruits only, the identification doubtful (Gray 

 Herbarium). 



Explanation of Plate 43.— Ripe fruits of Castillo, elastica. From Motzorongo speci- 

 mens. Natural size. 



EXCLUDED OR DOUBTFUL SPECIES. 



These are here listed with references to the text and with a few 

 additional notes. Poisson's Castillo, elastica Uga, not entered in the 

 text, is also commented upon. 



Page. 



Castifla markhnmiaiia Collins- ■--- I'ercbca markhaiiuana Iientb 241) 



Costilla tunu Hemsl ' 204-267 



Castillo, alba Koschny 251 



Castillo nigra Koschny 251 



Castilla rubra Koschny 251 



Castillo tunu is discarded on account of its having been established on hetero- 

 geneous materials, belonging in part to C. guatemalcnsis, in part to C. fallax, 

 and for the remainder to an insufficiently investigated species of British Hon- 

 duras and the Eastern coast of Central America, known among the natives under 

 the name of " tunu." Koschny's three species, which have never been described 

 botanically, are mere variations due to environment. The difference is mainly 

 in the bark and the specimens all show clearly the specific characters of C. Costa- 

 rica n a. 



anthers do in full flowers on the petals, resulting from the reversion of the 

 stamens. 



The disposition of the bracteole on the filament may be peculiar to the 

 Motzorongo form and C. elastica, as it has not been noticed in materials of 

 Central or South American origin. In this case it would constitute a very 

 good specific character. 



The stamens of the Motzorongo specimens seem to be partially affected by 

 some disease located in the anther cells, these looking sometimes abnormally 

 swollen and enlarged, with black spots on'tbe outside. 



