Bouvardia. RUBIAC/ELE. 23 



Series III. STELLATE. Ovules (peltate and) solitary in the cells of the 

 ovary : embryo incurved, in corneous albumen : leaves verticillate without stip- 

 ules, unless the supernumerary leaves be foliaceous stipules, which may in some 

 cases be nearly demonstrated. 



26. GALIUM/ Flowers 4-merous (rarely 3-merous), 2-carpellary, sometimes dioecious. 

 Calyx-tube globular ; limb obsolete, a mere ring or obscure border. Corolla rotate ; lobes 

 valvate, and commonly acuminate or mucronate apex iuflexed in the bud. Stamens with 

 short filaments and anthers. Style 2-cleft or styles 2 : stigmas capitellate. Ovary 2-celled, 

 2-lobed ; a single amphitropous ovule borne on the middle of the dissepiment in each cell. 

 Fruit didymous, dry, fleshy-coriaceous, or occasionally baccate, articulated on the pedicel, 

 tardily separating into two closed carpels, or only one maturing. Seed deeply hollowed on 

 the face : seed-coat adnate to the albumen within, and often also to the pericarp. 



1. EXOSTEMA, Rich. (Not Exostemma, to which later authors have 

 changed the name, which is from 4'tw, on the outside, and o-r?}w.a, stamen, i. e. 

 stamens exserted.) - -Tropical American shrubs or trees, one reaching Florida. 

 Rich, in Ilumb. & Bonpl. PL vEquin. i. 131, t. 38. Exostemma, DC, Prodr. 

 iv. 358 ; A. Rich. Rub. 200 ; Benth. & Hook. Gen. ii. 42. Cinchona Exostema, 

 Pers. Syn. i. 195 (1805), where the name first appears. 



B. Carib^um, RCEM. & SCHULT. Shrub 6 to 12 feet high, glabrous: leaves oblong-ovate 

 to lanceolate, coriaceous : stipules subulate, small : flowers on short and simple axillary pe- 

 duncles, fragrant : calyx-teeth very short : corolla white or tinged with rose ; tube inch long 

 and lobes hardly shorter: seeds narrowly winged. Syst. v. 18; Torr. & Gray, Fl. ii. 36. 

 Cinchona Caribcea, Jacq. Amer. t. 179; Lamb. Cinch, t. 4. C. Jamaicensis, Wright, in Phil. 

 Trans. Ixvii. t. 10; Audr. Bot. Rep. t. 481. Keys of Florida. (W. Iiid., Mex.j 



2. PINCKNEYA, Michx. GEORGIA BARK. (Charles Cotcsworth Pinck- 

 ney.} Singl^bpecies. 



P. pubens, MTCIIX. Tall shrub or small tree, pubescent: leaves ample, oblong-oval to 

 ovate, acute at both ends, petioled : stipules subulate, caducous : cymes terminal and from 

 upper axils, pedunculate : petaloid calyx-lobe resembling the leaves in form, pink-colored, 

 2 inches or more long : corolla inch long, cinereous-pubescent, purplish : capsule half-inch in 

 diameter. Fl. i. 103, t. 13; Michx. f. Sylv. t. 49; Bart. Fl. Am. Sept. t. 7; Auclubon, 

 Birds, t. 165 ; Torr. & Gray, Fl. ii. 37. P. pnbescens, Gaertn. Fruct. iii. 80, t. 194. PMnca 

 pubcsccns, Pers. Syn. i. 197. Cinchona Cwoliniana, Poir. Diet. vi. 40. Marshy banks of 

 streams in pine barrens of the low country, S. Carolina to Florida; fl. early summer. 



3. BOUVARDIA, Salisb. (Dr. Charles Bouvard.} -- Low shrubs or per- 

 ennial herbs (from Texas to Central America, some cultivated for ornament) ; 

 with mostly sessile and not rarely verticillate leaves, subulate interposed stipules, 

 and handsome tubular flowers in terminal cymes. --Parad. Lond. t. 88; HBK. 

 Nov. Gen. & Spec. iii. t. 288; Benth. & Hook. Gen. ii. 36. --Leaves in our 

 species mostly verticillate and corolla not glabrous, its short lobes ascending or 

 barely spreading. Flowers heterogone-dimorphous in the manner of Houstonia. 



B. ovata, GRAY. Herbaceous, glabrous, obscurely scabrous : leaves mostly in fours, short- 

 petioled, ovate, one or two inches long, costately 5-veined on each side of the midrib : corolla 

 probably purple or reddish, inch long, minutely puberulent. PI. Wright, ii. 67. S. Ari- 

 zona, between San Pedro and Santa Cruz, Wright. 



B. triph^lla, SALISB. Suffruticose or more shrubby, scabro-puberulent, 2 to 5 feet high: 

 leaves in threes or fours (or on branchlets in pairs), from oblong-ovate to broadly lanceolate, 

 usually hispidulous-scabrous, at least the margins, 3-4-veined each side of the midrib : corolla 

 scarlet, about inch long, outside furfuraceous-pubescent. Parad. Loncl. I.e. (broad-leaved 

 var., but not with villous-closed throat in any form); Ker, Bot. Reg. t. 107; Sims, Bot. 



