94 NORTH AMERICAN FLORA [Volume 32 



flowered, the flowers sessile or nearly so; bracts linear, elongate, foliaceous; hypanthium about 

 2 mm. long, strigose: calyx-lobes narrowly linear, 6-8 mm. long, green, sparsely pilose-strigose ; 

 corolla-tube slender, 9-13 mm. long, setose-pilose above, the throat densely yellow-bearded, 

 the lobes oblong-ovate, about 6 mm. long, obtuse or acutish, minutely papillose within; cap- 

 sule oblong-cylindric, 7-8 mm. long, costate, setose-pilose; seeds about 0.5 mm. long, dark- 

 brown, punctulate. 



Type locality: Guiana. 



Distribution: Wet soil, Trinidad and the Guianas; reported from Dominica. 



Illustrations: Aubl. PI. Guian. pi. 56; E. & P. Nat. Pfl. 4 4 :/. //, C-F. 



28. LIMNOSIPANEA Hook. f. in Hook. Ic. 11: 38. 1868. 



Slender erect herbs, branched above, the stems terete. Stipules obsolete. Leaves 

 verticillate or the uppermost opposite, narrow. Flowers small, in trichotomous terminal 

 c}-mes, bracteate and bibracteolate, pink;' hypanthium ovoid, hispid; calyx 5-lobate, the 

 lobes lanceolate, glandular within at the base, persistent; corolla salverform, the tube slender, 

 the throat pubescent, the limb 5-lobate, the lobes oblong, obtuse, spreading, contorted in bud. 

 Stamens 5, inserted in the corolla-throat ; filaments filiform ; anthers dorsifixed, oblong, obtus 3 , 

 exserted. Disk conic. Ovary 2-celled; style filiform, exserted, the 2 branches linear, obtuse; 

 ovules numerous, the placentae dilated, peltately affixed to the septum. Capsule ovoid, 

 crustaceous, 2-celled, tardily and locucidally bivalvate. Seeds numerous, minute, horizontal, 

 angulate; testa reticulate; endosperm fleshy. 



Type species, Limnosipanea Spruceana Hook. f. 



1. Limnosipanea palustris (Seem.) Hook. f. in Hook. Ic. 11: 38. 



1868. 



Sipanea palustris Seem. Bot. Voy. Herald 136. 1854. 



Perennial herb, about 20 cm. high, the stems decumbent, hirsute; leaves ternate, sessile, 



ovate-lanceolate, about 8 mm. long and 2 mm. wide, acute at the apex, glabrous; inflorescence 



dichotomous, the flowers solitary, sessile; calyx-lobes linear-lanceolate, acute, biaristate; 



corolla rose-colored, about 3 mm. broad, glabrous, or subpuberulent within; capsule subglobose, 



setose-pilose. (Description compiled.) 



Type locality: Swamps near Panama City, Panama. 

 Distribution: Known only from the type locality. 



IV. CINCHONEAE. Trees or shrubs, rarely herbs, sometimes scandent. 

 Stipules entire. Flowers perfect; corolla usually symmetric, sometimes 

 asymmetric, the lobes valvate, imbricate, or contorted. Anthers usually 

 dorsifixed. Ovary 2-celled, the ovules numerous. Fruit capsular. Seeds 

 numerous, usually minute, vertical or ascending, peltate, imbricate; radicle 

 usually superior. 



Corolla-lobes valvate. 



Placentae pendulous from the apex of the cell ; trees with spicate flowers. 30. AlsEis. 

 Placentae peltate or ascending; flowers not spicate. 



Plants twining, with mostly herbaceous stems; placentae ascending 



from the base of the septum. 31. Manettia. 



Plants erect, often fruticose; placentae peltately affixed to the 

 septum . 

 Flowers 4-parted; capsule subglobose; stems often herbaceous; 



leaves often verticillate. 32. Bouvardia. 



Flowers 5-parted; capsule oblong or clavate; stems fruticose; 

 leaves opposite. 

 Capsule loculicidal; anthers included. 33. Macrocnemum. 



Capsule septicidal; anthers exserted. 29. Ladenbergia. 



Corolla-lobes imbricate or contorted. 



Calyx -lobes dissimilar, one of them often expanded into a large white 



petiolate limb. 34. Calycophyllum. 



Calyx-lobes similar, none expanded into a petiolate limb. 

 Corolla-lobes contorted. 



Calyx tubular, deciduous; seeds not bearded. 36. Cosmibuena. 



Calyx parted to the base or wanting; seeds bearded. 37. Hillia. 



Corolla-lobes imbricate. 



