104 EUPHORBIACEAE. 



Stamens 10 or fewer: petals present. 15. Jatkopha. 



Flowers in simple or branched racemes. IG. Maxihot. 



Flowers in involucres : calyx represented by a scale. 



Involucre regular or nearly so, nearly or quite equilateral. 

 Glands of the involucres with petal-like appendages, 

 these sometimes much reduced. 

 Leaves all opposite. 17. Chamaesyce. 



Leaves alternate or scattered at least below the 



inflorescence. 18. Tithymalopsis. 



Glands of the involucres without petal-like appendages, 

 entirely naked, sometimes with crescent-like horns. 

 Stem topped by an umbel : stipules none : involucres 

 in open cymes, each with 4 glands and entire or 

 toothed lobes. 19. Tithymalcs. 



Stem not topped by an umbel : stipules gland-like : 

 involucres in cluster-like cymes, each with a 

 single gland or rarely 4 glands and fimbriate lobes. 2i>. Poinsettia. 

 Involucre irregular, very oblique. 21. Pedilaxthtjs. 



1. PHYLLANTHUS L. Herbs or partially woody plants. Leaf-blades 



entire. Flowers apetalous. Staminate flowers with 5 or 6 sepals and usually 3 



stamens. Pistillate flowers with 5 or 6 sepals and a 3-celled ovary. Fruit 



capsular. 



Plants annual : mature pistillate calyx 2.5 mm. wide. 



Leaf-blades cuneate to obovate : capsules about 1.5 mm. wide. 1. P. sa.ricola. 

 Leaf-blades oblong or nearly so : capsules about 2 mm. wide. 2. P. Niruri. 



Plants perennial : mature pistillate calyx 3 mm. wide. 



Leaf-blades oblong or nearly so : staminate calyx 2 mm. wide ; 



sepals ovate to orbicular-ovate. ^>. P- Garhcri. 



Leaf-blades cuneate : staminate calyx 1.5 mm. wide ; sepals 



suborbicular. -i- P. pentaphyllus. 



1. P. saxicola Small. Plants 0.5-3.5 dm. tall: leaf -blades cuneate to obovate, 

 abruptly narrowed at the base: staminate calyx 1.5 mm. wide; sepals subor- 

 bicular: mature pistillate calyx 2.5 mm. wide; sepals ovate to oblong-ovate: 

 capsules about 1.5 mm. wide. — Everglades and wet hammocks. — F. K. (Bah.) 



2. P. Niruri L. Plants 1-3 dm. tall: leaf -blades thin, oblong or nearly so: 

 staminate calyx 1.5 mm. wide; sepals orbicular-ovate: mature pistillate calyx 

 2.5 mm. wide; sepals oblong: capsules about 2 mm. wide. — Pinelands and waste 

 places.— F. K. (Ber., Bah., Cula, Ant.) 



3. P. Garberi Small. Plants 1-3 dm. tall: leaf -blades thickish oblong or 

 nearly so: staminate calyx 2 mm. wide; sepals ovate to orbicular-ovate: 

 mature pistillate calyx 3 mm. wide; sepals oblong to ovate: capsules 2.5-3 mm. 

 wide. — Coastal sand-dunes. — F. K. 



4. P. pentaphyllus Wright. Plants 0.5-3.5 dm. tall: leaf -blades thinnish, 

 mainly short-cuneate: staminate calyx 1.5 mm. wide; sepals suborbicular: 

 mature pistillate calyx 3 mm. wide; sepals obovate to elliptic: capsules less 

 than 1.5 mm. wide. [P. radicans (Muell. Arg.) Small.] — Pinelands. F. K. 

 {Ciiba.) 



2. CICCA L. Shrubs or trees. Leaf-blades entire. Flowers similar to 

 those of Phullanthiis, but with vertically opening anther-sacs. Fruit baccate. 



1. C. disticha L. Shrub or small tree, the branchlets spreading or drooping, 

 glabrous: leaves various, those near the base of the branchlets with suborbicu- 

 lar to orbicular-ovate blades 1..5-3 cm. long, those above them with larger 

 ovate to oblong-lanceolate blades: larger sepals suborl)icular to orbicular- 

 obovate, 1.5-2 mm. long: berries depressed, 1.5-2 cm. broad. — Pinelands and 

 waste places. F. K. Nat. of the E. Indies, and cultivated. — {Bah., Cuba, 

 Ant.) — Otaiieite-gooseberry. 



3. BREYNIA Forst. Shrubs or trees. Leaf-blades broad, entire. Flowers 

 solitary in the leaf-axils, or the staminate few together. Staminate flowers 



