44 MISSOURI BOTANICAL GARDEN. 



ico, and, after a break of unknown extent, into the center 

 of Central America, and eastwards to the Atlantic coast and 

 the Bermudas and eastern Antilles. The capsular species 

 are the prevalent northern form, and reach from South 

 Dakota to the Mexican state of Durango, and from the 

 Atlantic coast to Nevada, with the exception of the Great 

 Lake region and the upper Mississippi river and its tribu- 

 taries from the east. The baccate species with papery core 

 are of the southern Rocky Mountain and western region, 

 reaching the Pacific coast in the southern part of California 

 and at the extremity of Lower California, and are the preva- 

 lent form of the high table land of Mexico. A single spe- 

 cies with coreless fleshy fruit appears to be restricted to the 

 southern Atlantic coast of the United States, a small part 

 of the Gulf coast, and some of the islands to the east, 

 though it has given rise to a marked variety in the isolated 

 peninsula of Yucatan ; and a single species with the foliage 

 of this outlying species but forming a core in the fruit 

 occurs in Central America, where, though abundantly culti- 

 vated, its distribution is unknown. Several species and 

 many varieties are known only in gardens, and two species 

 with very aberrant fruit are of local distribution on the 

 southeastern seacoast of the United States. Plate 99. 



KEY TO 8PKCIB8. 



Fruit erect, capsular, dehiscent. Seeds thin, flat, margined: albumen 

 not ruminated. CHAKNOYTJCCA. 



Leaves finely filiferous (entire in forms of the second). 

 Style oblong, white. 



Inflorescence a long-peduncled panicle (subracemose in 

 some garden forms of Y. flaccida). 



Leaves lanceolate or spatulate, often plicate, at most 

 very narrowly lined with gray or brown next the mar- 

 ginal threads. 



Leaves rigid for the group, rather coarsely curly- 

 flliferous, subspatulate. Segments of young fruit 

 regularly convex. y. filamentosa. 



Leaves more flexible and attenuate, with finer 

 etraighter threads. Segments of young fruit 

 with angular facets. y. flaccida. 



