DISTEIBTJTION OF THE GENEEA, 9 



D. Seeds anatropous with an apical coma. 



Class III. ECHITE^ : seeds linear oblong compressed or terete, often with an 

 elongated rostrum terminated hy the micropyle, which is surrounded by a cup-shaped 

 ring, bearing a crown of 1 or 2 series of long hairs, usually called a coma. 



Tribe 15. MacrosiphoniejE : 2 very long subtorulose follicles, dehiscing along the ventral suture, 

 the narrow margins of which are inflected and seminiferous : seeds linear oblong com- 

 pressed, with an apical coma. Low erect, or prostrate plants, with a few axillary handsome 

 flowers, having an extremely long narrow tube with a broad rotate border. 



Macrosiphonia. 



lube 16. Stipecome^ : 2 follicles with very thick pericarp, sometimes very long, rugous or 

 verrucose, dehiscing along the ventral suture, either with 2 placentas conjoined by a keel 

 attached to the suture and then detaching itself, or else narrower remaining separately 

 attached to the suture : seeds elongated, terete, often with a long rostrum, suspended by 

 a longer or shorter f unicle, with an expanded apical coma : embryo in albumen, with a 

 superior radicle. 



Stipecoma, Rhynchodia, Roupellia, Reiinocladus, 



Chonemorpha, Strophyanthus, Rhodocalyx, Haplophytum. 



Tribe 17. Weightier : an oblong 2-celled capsule, splitting septicidally through a thick bila- 

 mellar dissepiment (becoming like 2 follicles), each cell gaping in the line of the axis, its 

 introflected margins being seminigerous : seeds inverted, the coma pointiug downwards : 

 embryo without albumen, the cotyledons convoluted. 



Wrightia, Kicksia. 



Tribe 18. PkestoniejE : an oblong 2-celled capsule, splitting septicidally, as in the preceding 

 tribe, the sutural margins being inflected, subseptiform and seminigerous : seeds many, 

 imbricated, oblong, furnished at the apex with a long coma, near which they are suspended ; 

 the radicle of the embryo points to the coma. 



Prestonia, Aptotheca, Balfouria, Aganosma, 



Nerium, Rhaptocarpus , Lyonsia, Heligme. 



Parsonsia, Beaumontia, Villaris, 



Tribe 19. Dipladenie^ : 2 long terete follicles dehiscing along the ventral suture, which is 

 inflected into 2 parallel placentae, bearing many oblong seeds suspended from a point near 

 the long apical silky coma : embryo in albumen, with a superior radicle. The chief pecu- 

 liarity consists in a disk of 2 flat opposite lobes alternating with the ovaries. 



Dipladenia, Homaladenia, Prestoniopsis, Carruthersia. 



Micradenia, 



Tribe 20. PaosECHiTEiE : 2 oblong or terete follicles, dehiscing along the ventral suture, which 

 is inflected into 2 parallel or 1 combined placenta, bearing many sublinear seeds suspended 

 from a point where the longitudinal raphe terminates, and which are crowned with a long 

 silky coma : embryo in albumen, with a superior radicle : disk urceolate, entire, or more 

 often partly cleft into 5 or 10 lobes. 



C 



