ON SOUTH-AMERICAN APOCYNACE X. 241 
6. ExoTHOSTEMON SPECIOSUM, G. Don, l c. p. 82: Echites speciosa, H. B. K. iii. p. 219; A, DC. Le. 
p. 460. Rio Orinoco: non vidi. 
A slender climber, with filiform branches, the younger ones hirtellous, all with remote 
axils; leaves oblong, acuminate, rounded and cordate at the base, membranaceous, 
green and glabrous above, reticulately veined, beneath paler and hirtellous, with pro- 
minent nerves, 23-23 in. long, 9-11 lines broad, on hairy channelled petioles 3 lines 
long; raceme lateral, pedunculate, 2 in. long, all hirtellous, its rachis flexuose; bracts 
2 lines long; pedicels 4 lines long; flowers yellow, 2 in. long; sepals acutely oval; tube 
of corolla 9-10 lines long, sericeo-pilose in the mouth; stamens and other parts as in 
the preceding species; follicles 2, terete, fuscous, smooth, pointed, 7 in. long, the sutural 
placenta afterwards free; seeds oblong, 5 lines lohg, dorsally convex and pilosulous, 
channelled on the opposite face; coma sericeous, ferruginous, deciduous. 
7. ExorHosrEMON PALUDOSUM, G. Don (in parte), l.c. p. 83: Echites paludosa, H. B. K. (non Vahl), 
iii. p. 221. In Cuba: non vidi. 
A climbing species, with striate terete glabrous branches; leaves oblong or oblong- 
linear, acute at the base, acute or shortly acuminate at thé apex, membranaceous, 
entire, glabrous, reticulately veined, with a prominent midrib beneath, 2-23 in. long, 
4-11 lines broad, on glabrous channelled petioles 4-5 lines long; raceme terminal, 2 in. 
long, pedunculate, bearing 2 to 4 geminate flowers on pedicels 4 lines long; sepals 
acutely oblong, glabrous, reticulately veined, 3 lines long; corolla glabrous, its tube 
cylindrical, much longer than the sepals, its segments as in the last species; the sta- 
mens inserted on a pilose ring in the throat ; the anthers exserted, bearded: the rest as 
in all the preceding species. 
A species confounded with the Echites (Rhabdadenia) palustris, Vahl, which it much 
resembles in habit, but differs in the narrow cylindrical tube of the corolla with a pilose 
ring in the throat, on which the exserted stamens are seated. 
8. Exornosremon sericeum, nob.: Prestonia sericea, Mart. & Galeot. Bull. Acad. Brux. xi. p. 360; 
Walp. Rep. vi. p. 473. In Mexico, prope Oaxaca: non vidi. 
A climbing plant, with villous branches: leaves ovate-lanceolate, subcordate, acu- 
minate, villous and scabridulous above, flavescent and sericeo-tomentose beneath, 
subsessile; panicle axillary, with a bifid peduncle longer than the leaves, fulvo- 
tomentose, each branch corymbiferous ; bracts linear-aeuminate; sepals rather large, 
cordately ovate, acuminate, villous; corolla salver-shaped; tube sericeously villose ; 
segments obovate; stamens half-included, semi-exserted; no appendages in the mouth 
of the tube. 
9. ExornosrEMON CONTORTUM, nob. : Hemadictyon contortum, Mart. & Gal. Bull. Acad. Brux. xi. p. 360; 
Walp. Rep. vi. p. 473. In Mexico, prope Oaxaca: non vidi. 
A subscandent species; leaves oval, subcordate, acuminate, pubescent above, puberulo- 
velutinous beneath ; panicles axillary, on a bifid peduncle longer than the leaf, each 
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