3. Ca*scoba.] 73. QENTIANACEM, 



trichotomous panicles. 3. C. diffusa, Bar. is a pretty little plant 6-18 

 high and has dichotomous panicles with foliaceous bracts at the forks. 

 They are both frequent on wet banks. 



Fam. 74. APOCTOACEJE. 



Trees, shrubs or herbs, often climbing, with opposite or 

 whorled (alt. in the cultivated Thevetia and Plumeria) quite 

 entire simple exstipulate leaves aDd usually milky juice. Fls. 

 regular, 2«sexnal, cymose or axillary. Calyx inferior with 5 

 imbricate lobes. Corolla usually rotate or salver-shaped 

 (funDe)- shaped in Thevetia). St. 5 rarely 4, on the corolla, nob 

 connatoas in the Asclepiadaceae but with their anthers usually 

 conniving over the stigma and sometimes adhering to it 

 Pollen granular. Disc often large. Ovary 2-celled or 

 usually of two more or less distinct carpels united by the 

 style, the top of which is usually enlarged. Ovules 2 to many 

 in each cell, rarely 1 only. Fr. of follicles,* mo re rarely a 

 berry or drupe. Seeds often with a coma of silky hairs or 

 winged. Albumen present or not. 



I. — Anthers not adhering to the stigma. 



(a) Ovary 2-celled. Fr. a berry or drupe 



A spinous shrub. L. opposite . . • .1. Carissa. 

 A larte unarmed shrub with narrow alt. leaves • 2. Thevetia. 



(b) Ova y of 2 distinct (sub -connate in 4) carpels united 

 by the style— 



A small tree or shrub with alt. large leaves . • 3. Plumeria, 



A shrub with 3-4-nately whorled leaves. Fr. a drupe 4. Rauwolfia. 



A tree with whorled leaves, Fr. of follicles . . 5. Alstonia. 



A small tree or shrub, L opposite. Fr. of follicles 6. Holarrhena. 



II.— Anthers adhering to the stigma by a point. Ovary of 

 distinct carpels united by the style. Fruit of 2 

 free or united follicles. 



(a) Mouth of corolla with scales.— 



1. Anthers exserted, Small tree. Follicles oonaate 7. Wtighlia. 



2. Anthers included— 



Erect shrub. L. whorled . , » . .8. Nerium. 

 Climbing shrubs L. opposite. Petals caudate. 9. Strophanthtw, 

 423 



