EUPHOEBIACEAE. 67 



many. Gynoecimn of 2-5 more or less united carpels. Ovary usually 

 lobed. Stigmas mostly introrse. Fruit a drupe or a samara, or baccate. 



Fruit baccate : corolla present : ovary not notched at the apex. 1. PICBAMNIA. 



Fruit sainaroid : corolla wanting : ovary notched at the apex. 2. ALVARADOA. 



1. PICRAJVLN1A Sw. Shrubs or trees. Leaf-blades unequally pinnate, 

 the leaflets thickish. Flowers dioecious, spicate or racemose. Sepals 3-5, 

 short. Petals 3-5, imbricate or wanting. Stamens 3-5, unappendaged. Ovary 

 2-3-celled, not lobed: style very short. Fruit a berry. 



1. P. pentandra Sw. Shrub or small tree: leaflets 5-7; blades elliptic to 

 oblong-elliptic, or rarely ovate, 5-10 cm. long, lustrous above: berries oblong, 

 10-15 mm. long. BITTER-BUSH. 



Hammocks, E. Keys and F. Keys. (W. I.) 



2. ALVARADOA Liebm. Shrubs or trees. Leaf-blades unequally pin- 

 nate, the leaflets thinnish. Flowers dioecious, borne in spreading or drooping 

 racemes. Sepals 5, short. Petals wanting. Stamens 5, alternating with 5 

 staminodia. Ovary flattened or 3-angled, 2-3-celled, notched at the apex. 

 Fruit sainaroid. 



1. A. amorphoides Liebm. Shrub or small tree: leaves approximate at the 

 ends of the branches; leaflets numerous, the blades 1-2 cm. long, those of the 

 lateral leaflets mostly oblong or oval: flowers numerous, slender-pedicelled : 

 sepals ovate, about 1.5 mm. long: filaments pubescent: capsules oblong or 

 ovate-oblong, 12-14 mm. long, ciliate, notched. ALVARADOA. 

 Hammocks, E. Keys. (W. I.) 



Order 16. EUPHORBIALES. 



Herbs, shrubs, or trees. Leaves various, sometimes reduced to scales 

 or almost wanting. Flowers mainly monoecious or dioecious, regular. 

 Calyx of several sepals. Corolla of several petals, or often wanting. 

 Androecium of more than one stamen, except when the staminate flowers 

 are scattered over the inside of an involucre. Filaments distinct or united. 

 Anthers opening by longitudinal or transverse valves. Gynoecium 2-sev- 

 eral-carpellary or 1-carpellary, superior. Styles or stigmas usually dis- 

 tinct and cleft, or foliaceous. Ovules 1, 2 or 3 in each cavity. Fruit 

 capsular, sometimes achene-like, drupaceous or baccate. Seeds often 

 carunculate. 



FAMILY 1. EUPHOEBIACEAE. SPURGE FAMILY. 



Herbs, shrubs, or trees, often with milky sap. Leaves opposite, 

 whorled, or alternate: blades simple and entire, toothed or lobed, or com- 

 pound. Flowers monoecious or dioecious, solitary or variously clustered, 

 or much reduced and in an involucre (Euphorbia and related genera). 

 Calyx of 2-several sepals or obsolete. Corolla of 2-several petals or 

 wanting. Androecium of few-many stamens. Fruit usually depressed 

 or slightly elongate. 



Flowers not in an involucre : calyx of several sepals. 

 Ovules and seeds 2 in each cavity. 



Stamens 5 : corolla present. 1. SAVIA. 



Stamens 2 or 3 : corolla wanting. 



