126 NORTH AMERICAN FLORA [Volume 32 



26. Exostema indutum Standley, sp. nov. 



Shrub, the branches slender, grayish, minutely hirtellous when young, the internodes 

 elongate; stipules 2-3 mm. long, deltoid, acuminate, thick, brown; petioles slender, 3-5 mm. 

 long, puberulent; leaf-blades ovate-oblong or elliptic-oblong, 5.5-9 cm. long, 2.5-3.5 cm. wide, 

 obtuse or acutish at the base, abruptly acuminate at the apex, membranaceous, bright-green 

 above, glabrous, the venation impressed, paler beneath, pilose, especially along the veins, 

 with short white appressed hairs, the lateral veins prominent, arcuate, the margin plane; 

 inflorescence terminal and axillary, cymose-corymbose, 4-8 cm. broad, densely many-flowered, 

 the pedicels 1-3 mm. long, densely cinereo-puberulent ; hypanthium 2.5-3 mm. long, cylindric, 

 densely cinereo-puberulent; calyx-lobes 5, minute, ovate, acute; corolla yellow, densely cinereo- 

 puberulent or pilosulous outside, the tube slender, 6 mm. long, the 5 lobes oblanceolate, obtuse, 

 7-9 mm. long, ascending or spreading; stamens exserted, the anthers 3-3.5 mm. long. 



Type collected in Oaxaca, altitude 900 meters, Galeotti 2664 (U. S. Nat. Herb. no. 572997). 



Doubtful species 



Exostema canescens Bartl.; DC. Prodr. 4: 359. 1830. {Cinchona canescens Brign. 

 Mem. Soc. Ital. Modena II. 1: 63. 1862.) Described from Mexico; inflorescence axillary, 

 1-flowered; leaves pubescent. Probably not of this genus. 



Exostema coriaceum (Poir.) R. & S. Syst. Veg. 5: 20. 1819. (Cinchona coriacea Poir. 

 in Lam. Encyc. 6: 38. 1804.) Described from Santo Domingo. The description suggests 

 E. purpureum Griseb. 



Exostema neriifolium A. Rich, in Sagra, Hist. Cuba 11: 7. 1S50. Described from 

 Cuba. The descripion does not agree with any material examined by the writer. 



39. COUTAREA Aubl. PI. Guian. 314. 1775. 



Trees or shrubs, the branchlets terete. Leaves opposite, petiolate, membranaceous. 

 Stipules interpetiolar, short, acute. Flowers large, terminal or axillary, solitary or cymose, 

 pedicellate, bracteolate or ebracteolate ; hypanthium obovoid-turbinate; calyx 5-8-lobate, 

 the lobes subequal, narrow, deciduous; corolla funnelform-campanulate, more or less oblique, 

 the tube often curved and gibbous-ventricose, often angulate, the throat glabrous, the limb 

 5-8-lobate, the lobes short, spreading, plicate-imbricate or contorted, one of the lobes exterior. 

 Stamens 5-8, inserted at the base of the corolla; filaments filiform; anthers basifixed, elongate- 

 linear, exserted. Disk swollen. Ovary 2-celled; style filiform; stigma clavellate-subulate, 

 exserted; ovules numerous, horizontal, the placentae swollen, affixed to the septum. Capsule 

 oval or obovoid, more or less obcompressed, coriaceous or ligneous, 2-celled, loculicidally 

 bivalvate, the valves cleft, the septum finally free. Seeds numerous, imbricate, ascending, 

 the hilum marginal, the body compressed, the testa membranaceous, expanded into a broad 

 wing; endosperm fleshy; cotyledons cordate, the radicle elongate, centripetal. 



Type species, Coutarea speciosa Aubl. 



Corolla 8-lobate, symmetric; calyx-lobes usually 8; capsule only slightly com- 

 pressed; pedicels ebracteolate. 1- C. octomera. 

 Corolla 6-lobate; calyx-lobes 6. 



Corolla symmetric or nearly so, the tube not gibbous; capsule only slightly 

 compressed; flowers solitary; stamens equaling or usually shorter than 

 the corolla. 

 Pedicels ebracteolate; calyx-lobes 6-10 mm. long; corolla-lobes 6-10 mm. 



long, often half as long as the tube. 2. C. latiflora. 



Pedicels bracteolate; calyx-lobes 10-20 mm. long; corolla-lobes about 

 one fourth as long as the tube. 

 Capsule 2-3 cm. long; corolla 6-8 cm. long; leaf -blades mostly ovate 



or oval. 3. C. plerosperma. 



Capsule 1.2-1.4 cm. long; corolla about 10 cm. long; leaf-blades nar- 

 rowly lance-oblong. 4. C. Lumaeana. 

 Corolla asymmetric, the tube gibbous; capsule strongly compressed; flowers 



mostly in 3-flowered cymes; stamens longer than the corolla. 5. C. hexandra. 



