198 RUBIACEJE. (MADDER FAMILY.) 



1. R. aculeata, L. Spiny or unarmed; leaves small, obovate, smooth, 

 coriaceous; flowers solitary, axillary; corolla (white) hairy iu tin- throat, the 

 tube 2-3 times as long as the calyx, the limb convolute in the bud. South 

 Florida. Branches rigid. Leaves 5"- 10" long, rather longer than the sub- 

 ulate spreading spines. Corolla 3" -4" long. Fruit ovoid, as large as a pea, 

 about 6-seeded. Sinuses of the calyx hairy. 



17. CATESBJEA, L. 



Calyx 4-toothed or 4-parted. Corolla funnel-shaped, 4-lobecl. Stamens 4, 

 inserted on the base of the corolla. Stigma 2-lobed. Berry 2-celled, many- 

 seeded, the placenta3 at the top of the partition. Seeds flat, imbricated. 

 Spiny shrubs, with small thick opposite leaves, and axillary whitish flowers. 



1. C. parviflora, Swartz. Glabrous; leaves oval or obovate, mostly 

 shorter than the spines, the margins revolute ; flowers sessile ; corolla small 

 (4" long), the tube 4-augled; berry globose. Bahia Honda, South Florida 

 (Curtiss). Shrub 4-8 high. 



18. PINCKNEYA, Midix. GEORGIA BARK. 



Calyx obloug-obovate, 5-lobed, the lobes lanceolate, deciduous, or one of 

 them, iu the outer flowers, often transformed into a large colored leaf. Co- 

 rolla tubular, hairy, with five liuear-oblong revolute lobes, slightly imbricated 

 in the bud. Stamens 5, exserted : anthers oblong. Stigma obtuse. Capsule 

 globose, papery, 2-celled, opening loculicidally at the apex, and at length sep- 

 ticidally to the base. Seeds numerous, in two rows, horizontal, membrana- 

 ceous, winged. A shrub or small tree, with pubescent brandies. Leaves 

 large, oval or oblong, acute, smoothish above, the lower surface, like the 

 terminal compound cyme, hoary-pubescent. Stipules linear, deciduous. 



1. P. pubens, Michx. Marshy banks of streams in the pine barrens, 

 Florida to South Carolina. May -June. More conspicuous for its ovate 

 pink-colored floral leaves, than for its purplish spotted corolla. 



19. EXOSTEMMA, DC. 



Calyx obovate or tubular; the limb 5-toothed, persistent. Corolla tube 

 very long, terete ; the limb with five long linear recurved lobes, valvate in the 

 bud. Stamens 5, exserted. Style filiform, thickened above. Stigma obtuse 

 or 2-lobed. Capsule coriaceous, ovoid, 2-celled, opening loculicidally at the 

 apex, and septicidally nearly to the base, many-seeded. Seeds circular, im- 

 bricated, winged. Trees or shrubs. Leaves opposite. Stipules solitary 

 Flowers white or reddish. 



1. E. Caribseum, R. & S. Smooth; branches slender; leaves ovate- 

 lanceolate, acuminate ; peduncles axillary, solitary, 1 -flowered ; corolla as 

 long as the leaves. South Florida. Shrub 6- 12 high. Corolla 2' long, 

 fragrant. 



20. HOUSTONIA, Gronov. BMTETTE. 



Flowers tetramerons, dimorphous. Calyx 4-toothed. Corolla salver- or 

 funnel form, 4-lobed, valvate in the bud. Stamens and styles long or short. 





