Tas. 8274. 
EXOSTEMMA suscorDATUM. 
West Indies. : 
RusraceazE. ‘Tribe CINCHONEAE. 
Exostremma, Rich.; Benth. et Hook. f. Gen. Plant. vol. ii. p. 42. 
 Exostemma subcordatum, Krug et Urban in Urb. Symb. Antill. vol. i. p. 421; 
 affinis H, floribundo, Roem. et Schult., sed foliis subcordatis calycis- 
que segmentis longioribus differt. 
Frutex, 2-3 m. altus (Jacquemont). Rami teretes, juniores brevissime vel 
minutissime puberuli, demum glabri, cortice cinereo. Folia ovata vel 
ovato-lanceolata, basi plus minusve subcordata, apice acuminata, 5-8 cm. 
longa, 2°5-4 cm. lata, margine revoluta, tenuiter coriacea, utrinque 
minutissime puberula, nervis lateralibus utrinque 6-8 supra impressis 
subtus elevatis; stipulae ovato-triangulares, acutae, 3 mm. longae. Jn/jlo- 
rescentia terminalis, laxe subcorymbosa ; ramuli puberuli; pedicelli 6-8 mm. 
longi, graciles; bracteae lineares vel subulatae. Receptaculum elongato- 
ellipsoideum, minute puberulum. Calycis segmenta linearia, obtusa vel 
subacuta, 5-8 mm. longa, fere glabra. Corolla alba ; tubus anguste cylindri- 
cus, 1*5-2 em. longus, extus glaber; lobi lineares, obtusi, circiter 2:5 em. 
longi, 2 mm. lati. Filamenta filiformia 1°5 cm. longa; antherae exsertae, 
flavae, 1 cm. longae. Stylus exsertus, gracilis, 4-5 em. longus, glaber; 
stigma ovoideum. Fructus oblongo-obovoideus, circiter 12 mm. longus, 
superne 5 mm. diametro.—J. Hurcuinson. 
The genus Exostemma includes nearly forty described 
species, whereof twenty are known to occur in the West 
Indies, chiefly in Cuba. £. subcordatum, the species now 
figured is, however, a native of San Domingo, and is met 
with in the more mountainous parts of that island. The 
plant from which our plate has been prepared was presented 
to Kew in 1903 by Professor Hansen, Director of the 
Botanic Gardens, Giessen, under the name E, floribundum, to 
which species it is indeed most nearly allied, but from which 
it chiefly differs, as Mr. Hutchinson points out, in baving 
longer calyx-segments; from this and all other known 
species of the genus it is, moreover, readily distinguished 
by its subcordate leaves. Under cultivation the Kew plant 
has formed a loosely-growing shrub about 3 ft. high; 
it flowers freely in autumn, the flowers being pure white 
SepTemBeER, 1909. 
