100 NORTH AMERICAN FLORA [Volume 32 



Doubtful or excluded species 



Manettia reclinaTA L. Mant. 558. 1771. (Nacibea reclinata Poir. in Lam. Encyc. 4: 

 416. 1797. Lygistum reclinatum Kuntze, Rev. Gen. 287. 1891.) The type species of the 

 genus; described from Mexico. It is evidently closely related to M. coccinea, but is said to 

 have white flowers. Possibly it is the same as that species, and, if so, M. coccinea should be 

 reduced to synonymy. 



Manettia secuxdiflora (Poir.) DC. Prodr. 4: 364. 1830. (Paederia secundiflora 

 Poir. in Lam. Encyc. Suppl. 2: 450. 1812.) Described from Santo Domingo. 



Manettia serrata Spreng.; Schultes, in R. & S. Syst. Yeg. Mant. 3: 147. 1827. Alchor- 

 nea latijolia Sw. (Euphorbiaceae). 



32. BOUVARDIA Salisb. Parad. Lond. pi. 88. 1807. 



Aeginetia Cav. Anal. Ci. Nat. 3: 129. 1801. Not A eginetia ~L. 1753. 

 Honslonia § Christimia Raf. Ann. Gen. Sci. Phys. 5: 226. 1820. 



Herbs or shrubs, more or less pubescent, the branches terete or angulate. Leaves opposite 

 or 3-5-verticillate, usually petiolate. Stipules interpetiolar, connate with the petioles into a 

 sheath, entire or laciniate or aristate. Flowers usually large, white, yellow, or red, cymose or 

 cymose-corymbose, sometimes solitary; hypanthium subglobose, turbinate, or campanulate; 

 calyx 4-lobate, the lobes short or elongate, erect or spreading, persistent, often with small 

 intermediate teeth; corolla tubular or salverform, the tube straight or slightly curved, glabrous, 

 pilose, or with a densely villous ring within, the limb 4-lobate, the lobes short or elongate, erect 

 or spreading, valvate, glabrous or pubescent within. Stamens 4, inserted in the throat of the 

 corolla or in the tube above the middle; filaments very short or elongate; anthers versatile, 

 linear or oblong, included or exserted, dehiscent by lateral slits. Disk annular, sometimes 

 pilose. Ovary 2-celled; style filiform; stigma usually bifid; ovules numerous, crowded, the 

 placentae swollen, peltately affixed to the septa. Capsule didymous-globose, coriaceous, 2- 

 celled, locucidally bivalvate, the valves finally bifid. Seeds numerous, orbicular, imbricate, 

 peltate, compressed; testa membranaceous, expanded into a broad entire wing; endosperm 

 fleshy; embryo minute, the cotyledons rounded, the radicle terete. 



Type species, Bouvardia triphylla Salisb. 



Leaves all or mostly 3-5-verticillate; corolla red. 

 Corolla glabrous outside. 



Corolla-lobes erect or ascending, 2-5 mm. long. 



Upper leaves sessile or nearly so, short-villous or tomentulose be- 

 neath; corolla-lobes 2-3 mm. long. 1. B. leiantha. 

 Upper leaves petiolate, puberulent, scaberulous, or glabrate be- 

 neath; corolla-lobes 3—5 mm. long. 2. B. bouvardioides. 

 Corolla-lobes widely spreading, 5-8 mm. long. 



Stems and leaves villosulous or tomentulose with slender whitish 



hairs; calyx-lobes 2.5-4.5 mm. long. 3. B. viminalis. 



Stems and lower surface of the leaves villous with very coarse 



yellowish hairs; calyx-lobes 8-12 mm. long. 4. B. scabra. 



Corolla pubescent outside. 



Leaf-blades obovate, often 5-verticillate. 5. B. obovata. 



Leaf -blades not obovate, 3-4-verticillate. 



Corolla-tube glabrous within or sparsely villous, the hairs not 



collected in a dense ring. 6. B. glaberrima. 



Corolla-tube with a densely villous ring within near the base. 



Leaves densely whitish-tomentose beneath. 7. B. scabrida. 



Leaves not tomentose beneath. 



Leaves elongate-linear, 3-9 cm. long and 0.6-3.5 mm. 



wide, often glabrous. 8. B. tenuifolia. 



Leaves not elongate-linear, if very narrow the blades 



usually less than 3 cm. long, usually lanceolate to ovate. 9. B. lernifolia. 



Leaves opposite. 



Corolla-lobes usually 3-5 mm. long, of an ovate or triangular-oblong 

 type, mostly erect or ascending; corolla yellow, red, white, or 

 greenish-white, the tube 1-3.3 cm. long. 

 Inflorescences usually 3-5-flowered, simply cymose, sometimes 1- 

 flowered; leaves pinnately nerved. 

 Corolla red or yellow. 



Corolla-lobes villous outside with coarse hairs; leaf-blades 

 mostly rounded-ovate and cordate or subcordate at the 



base. 10. B. subcordata. 



Corolla-lobes glabrous outside; leaves not cordate at the 

 base. 



