APOCYNACEAE. 115 



capsules 5-6 mm. long. — Hammocks, U. keys, L. keys. — [E. K.] — (Bah., Cuba, 

 Ant.) 



Order ASCLEPIADALES. 



Herbs, shnibs, or trees, commonly with a milky juice. Leaves alter- 

 nate or opposite : blades entire. Inflorescence cymose, sometimes umbel- 

 late. Calyx of usually 5, partially united, sepals. Corolla of 5, partially 

 united, petals. Androecium of mostly 5 distinct or monadelphous stamens, 

 partially adnate to the corolla in Asclepiadaceae and accompanied by a 

 5-lobed crown. Pollen granular or in waxy masses. Gynoecium of usually 

 2 carpels, sometimes united only at the apex. Stigma terminal. Fruit a 

 pair of follicles, or drupaceous. 



Styles united : stamens distinct : pollen loosely granular. Fam. 1. Apocynacbae. 

 Styles distinct : stamens usually monadelphous : pollen 



united into waxy masses or the grains in groups of 4. Fam. 2. Asclepiadaceae. 



f <^ Family 1. APOCYNACEAE. Dogbane Family. 



Perennial herbaceous or woody plants, with mostly dichotomous, 

 cymose inflorescence. Androecium of mostly 5 stamens, with the anthers 

 converging around the stigma or slightly adhering to it, not accompanied 

 by a crown. Gynoecium of 2 carpels, the styles and stigmas at least 

 united; two carpels usually maturing. 



Anthers unappendaged at the base, not connected with the stigma : corolla-lobes 

 sinistrorsely convolute. 

 Fruit drupaceous : shrubs or trees. 



Corolla salverform. relatively small ; lobes equilateral, 



shorter than the tube. 1. Vallesia. 



Corolla funnelform. relatively large; lobes inequilateral, 



longer than the tube. 2. Cerbeba. 



Fruit a pair of follicles : herbs sometimes partially shrubby. 3. Ammocallis. 

 Anthers appendaged at the base, converging around the stigma 

 and partially adherent to it : corolla mostly dextrorsely 

 convolute. 

 Corolla funnelform. the throat widened upward. 



Calyx-lobes relatively long and narrow : scale-like glands 



borne at the base of the calyx within. 4. Urechites. 



Calyx-lobes relatively broad and short : scale-like glands 



wanting. 5. Rhabdadenia. 



Corolla salverform, the throat narrowed upward. 6. Echites. 



J-i'f 1. VALLESIA R. & P. Shrubs. Leaves alternate: blades relatively 

 broad. Calyx-lobes short. Corolla salverform, the throat contracted at the 

 mouth. Drupe narrow. Seeds clavate. 



1. V. glabra Cav. Shrub: leaves remote; blades elliptic to oblong or oblong- 

 lanceolate, 4-7 cm. long: calyx-lobes deltoid to ovate-deltoid, less than 1 em. 

 long: corolla white; tube 5-6 mm. long; lobes linear-oblong, 3-4 mm. long: 

 drupe 10-14 mm. long. — Hammocks, L. keys. — {Bah., Cuba, Ant.) 



2. CEE.BEEA L. Shrubs or trees. Leaves alternate: blades relatively 

 narrow. Calyx-lobes long. Corolla funnelform, the throat not constricted at 

 the mouth. Drupe broad. Seeds angular. 



1. 0. Thevetia L. Shrub: leaves approximate; blades narrowly linear, 8-16 cm. 

 long: calyx-lobes lanceolate, 5-7 mm. long: corolla saffron-colored: tube 2-2.5 

 cm. long; lobes very broad, 3-4 cm. long: drupe depressed, 3-4 cm. broad. — 



