82 EUPHOEBIACEAE. ' 



12. C. Tracyi Small. Branches thinly caneseent: leaf -blades oblong to slightly 

 broadest above the middle: involucres fully 1 mm. long, sparingly pubescent: 

 gland-appendages minute, unequal and uneven: capsules nearly 2 mm. broad, 

 slightly pubescent all over: seeds less than 1 mm. long.- — Coastal sand-dunes 

 and hammocks, U. keys. — [E. K.] 



13. C. adenoptera (Bertol.) Small. Branches closely villous: leaf -blades oblong 

 or ovate-oblong: involucres 1-1.5 mm. long, finely pubescent: gland-appendages 

 T^hite or pink, petaloid, 2 of them much larger than the glands: capsules about 

 1.5 mm. broad., densely pubescent: seeds about 1 mm. long. — Pinelands and 

 sandy places, L. keys, L. S. keys. — [E. K.] 



14. C. hirta (L.) Millsp. Branches closely jjubescent: leaf -blades oblong to 

 oblong-lanceolate, or somewhat triangular, often prominently blotched: invo- 

 lucres mostly in axillary clusters, 1 mm. long or less, minutely pubescent: 

 gland-appendages obsolete or nearly so: capsules fully 1 mm. broad, finely 

 pubescent: seeds about 1 mm. long.- — Hammocks, U. keys, L. keys. — [E. K.] — 

 (Ber., Bah., Cuba, Ant.) 



15. C. gemella (Lag.) Small. Similar to C. hirta but smaller, and with more 

 closely prostrate branches: leaf -blades oblong to oblong-lanceolate, mostly 

 evenly green: involucres mostly in terminal clusters, about 1 mm. long, finely 

 pubescent: gland-appendages white, narrower than the glands: capsules fully 

 1 mm. broad, often closely pubescent : seeds less than 1 mm. long. — Hammocks 

 and sandy places, U. keys, L. keys. — [E. K.] — (Ber., Bah., Cuba, Ant.) 



18. TITHYMALUS Adans. Annual or perennial herbs or partially 

 woody plants, topped by an umbel. Leaf-blades entire or finely toothed. 

 Involucres in open or compact cymes, each with 4 naked or merely horned 

 glands. Capsule smooth or tuberculate. Seeds pitted. — Spurgk. 



1. T. trlchotomus (H. B. K.) Kl. & Garcke. Stems 1-4 dm. tall: leaf-blades 

 cuneate to oblong, 0.5-1.2 em. long: bracts similar to the leaves: involucres 2 

 mm. long ; glands obrenif orm : capsules about 4 mm. broad, minutely wrinkled : 

 seeds subglobose, fully 1.5 mm. in diameter. — Coastal sand-dunes and sandy 

 shores, U. keys, L. keys, L. S. keys. — [E. K.] — (Bah., Cuba, Ant.) 



19. POINSETTIA Graham. Annual, biennial, or perennial herbs or 

 woody plants. Leaf-blades entire, toothed, or lobed, those of the upper ones 

 often like the bracts highly colored or discolored. Involucres solitary or 

 cymose, each with 1, or rarely 3 or 4, unappendaged glands. Capsule smooth. 

 Seeds tuberculate. — Spurge. 



Leaves, at least those of the main stem, and the bracts, with broad, toothed, pan- 

 durate or pinnately lobed blades, those of the branches often narrow : plants 

 pubescent : involucral glands mostly solitary. 

 Broad leaves with toothed blades. 1. P.lntrrnphiiUa. 



Broad leaves with pandnrate or pinnately lobed blades. 2. P. cijothophora. 



Leaves throughout the plant with very narrowly linear entire 



blades : plants glabrous : involucral glands mostly 3 or 4. 3. P. pinetorutn. 



1. P. heterophylla (L.) Small. Perennial, stems 3-12 dm. tall: leaf -blades 

 obovate, oblong, or ovate, or narrower, especially on the branches, 5-15 cm. 

 long: involucres campanulate, mostly over 3 mm. long: capsules 3.5-4 mm. 

 long: seeds 3-3.5 mm. long, prominently tuberculate. — Hammocks, U. keys, L. 

 keys, L. S. keys.— [E. K.]—(Bcr., Bah.. Cuba, Ant.) 



2. P. cyathophora (Murr.) Small. Annual, stems 1.5 m. tall or less, pubes- 

 cent: leaf-liliulcs oliloiig or oval, varying to obovate or ovate, or narrower 

 especially on the branches, 5-18 cm. long: involucres campanulate, 3.5-4 mm. 

 long: capsules 4-4.5 mm. long: seeds 3-3.5 mm. long, tuberculate. — Hammocks, 

 and cultivated grounds, U. keys, L. keys. — [E. K.] — (Ber., Bah., Cuba, Ant.) — 

 Painted-leaf. 



