262 ON SOUTH-AMERICAN APOCYNACEAL, 
rower below the middle, obtuse or subcordate at the base, subobtuse and mucronate at 
the apex, chartaceous, glabrous, fuscous green above, somewhat shining, with arcuate 
nerves and reticulate veins, beneath yellowish-green, 3-42 in. long, ¿-1 in. broad, on 
petioles 2-3 lines long; corymbs large, solitary at the nodes, much longer than the 
leaves, on a peduncle twice or thrice cleft from near its base, hirtellous, bearing many 
smallish flowers on pedicels 7-16 lines long; sepals acuminately ovate, recurved at the 
apex, 2-2] lines long, each with an inner deltoid crenulate scale; tube of corolla 
slabrous, cylindrical, broader at the base, constricted in the middle, again widening at 
its 5-plicate mouth, which bears within 5 small ovate appendages; segments obliquely 
obovate, ciliate on the margins, a little shorter than the tube; stamens seated on a 
pilose ring in the constriction of the tube; anthers glabrous, 12-24 lines long, their 
summits exserted. 
19. HÆMADICTYON MACRONEURUM, Müll. Fl. Bras. xxvi. p. 169 (excl. syn. Vell). In Amazonas, ad Rio 
Japuré (Martius 3029) : non vidi. 
A species very distinct from Echites megalagrion of Velloz, to which Müller refers it. 
It has glabrous branches; leaves elliptic or oblong-ovate, acute at the base, with a short 
acumen, rigidly subcoriaceous, fuscously palish above, very glabrous, sulcate on the 
strong midrib and nerves, fuscous-yellowish beneath, with stout prominent midrib, 
nerves, and reticulate veins, 54 in. long, 31-4 in. broad, on petioles 34-54 lines long; 
panicle upon a peduncle 1] in. long, bifid above, and densely flowered on alternate or 
geminate very approximate pedicels as long as the sepals, with 3 basal bracts of equal 
length ; sepals oblong-ovate, acutely acuminate, membranaceous, glabrous, 52 lines long, 
each with an inner ovate truncate denticulate scale; corolla 14 in. long; its tube 
1 in. long, broadly cylindrical, reddish, its mouth furnished with an elevated spotted 
ring; segments scarlet, puberulous outside; stamens seated below the mouth on a 
retrorsely pilose ring; anthers glabrous, shortly exserted, the appendages extending 
beyond them; disk urceolate, with 5 short lobes as long as the 2 ovaries. 
20. Hamabicrron Amazonicum, Benth. MSS.; Müll. l.c. p. 166. In Amazonas, Rio Trombetas 
(Spruce 239) : non vidi. 
A climbing species, with slender, pubescent, verruculous, fuscous-red branches, having 
remote axils; leaves elliptic-ovate, subobtuse at the base, shortly and acutely acuminate, 
rigidly membranaceous, fuscous, concolorous, shortly puberulous or glabrescent, with 
5-6 pairs of nerves and reticulate veins, 42 in. long, 2% in. broad, on petioles 3} lines 
long; raceme at each node nearly as long as the leaves, on'a rather long peduncle, 
bearing above few flowers on puberulous pedicels, supported by small ovate-lanceolate 
bracteoles; sepals ovate-acuminate, 32 lines long, with 4-6 inner subbifid scales ; tube 
of corolla shortly hirtellous, 61 lines long, with a plicate callous ring in the mouth, 
and the usual semi-exserted appendages; segments obliquely inequilateral, 4 lines long ; 
anthers slightly exserted ; disk half-cleft into 5 lobes around the 2 hairy ovaries. 
