ON SOUTH-AMERICAN APOCYNACER. 113 
at the summit into long slender appendages, spirally twisted together, and scarcely 
reaching the mouth; disk of 5 ovate fleshy lobes, half the length of 2 acutely oblong 
ovaries; style shortish, clavuncle incrassate, with a basal peltate membrane; stigmata 2, 
pilose; 2 erect follicles, slender, terete, arching, conjoined at the apex, near 3 in. long, 
1 line thick. 
4. CHARIOMMA FLAVA, nob.: Dipladenia flava, Hook. Bot. Mag. tab. 4702; Müll. in Linn. xxx. 445; 
Walp. Ann. v. 496. In Nova Granada (Purdie), in Kew cult. : non vidi. 
A scandent plant, closely resembling the typical species in its habit and inflorescence, 
more especially in its stamens terminated by long setiform appendages; there can be no 
hesitation, therefore, in placing it here, especially as Sir William Hooker did not observe 
its disk. Its terete branches are firm, pilose when young; its axils 3 in. apart; its 
opposite leaves ovate, subacute at the base, shortly and acutely constricted at the apex, 
submembranaceous, younger ones pilose, 2-23 in. long, 1-11 in. broad, on petioles 
4-6 lines long; raceme axillary or terminal, with 2 or 3 showy yellow flowers, or only a 
single one by abortion, all sericeo-pilose; peduncle 6 lines long; bracts foliaceous, 
4 lines long; pedicels 4 lines long; sepals subulate, 4 lines long; tube of corolla 1 in. 
long, narrowly constricted below the middle; segments broadly dolabriform, 1 in. long 
and broad ; stamens included, their long twisting appendages reaching the mouth. 
5. CHARIOMMA NOBILIS, nob.: Dipladenia nobilis, Lemaire, Ann. Soc. Gand. iii. 331, tab. 152; Van 
Houtte, Fl. des Serres, v. 437; Paxton, Mag. Bot. xvi. 66, cum icone; Walp. Ann. iii. 44; Müll. 
Fl. Bras. ¢. c. p. 130. In Brasilia, prov. S. Catharina: non vidi. 
A handsome species, only known as a cultivated plant. It approaches C. flava in its 
elongated twisting anthers. It has several erect stems growing out of a tuberous root, 
which are green, glabrous, and lactescent; leaves small, oyate, subcordate, with a short 
obtuse acumen, shining above, with numerous parallel nerves; racemes opposite, with 
large, tricoloured flowers; sepals small, gibbous at the base, recurved at the apex; tube 
of corolla 3 in. long, narrowly cylindrical at its base for the length of 1 in., funnel- 
shaped above, and costate, yellow below, dark purple within the mouth; segments un- 
guiculate, broadly dolabriform, uncinately acute, of a pale rose-colour ; stamens inserted 
in the constriction of the tube; anthers very elongated at the apex, and there spirally 
twisted together. 
The plant is certainly not a Dipladenia. 
6. CHARIOMMA VERTICILLATA, nob.: Apocynum scandens, amplissimo' flore luteo; Plumieria fol. ovato- 
oblongis, Plum. Amer. i. p. 21, tab. 29: Nerium oleander, Lunan (in parte), Hort. Jam. ii. 181. 
In Jamaica : non vidi. 
A handsome species, differing from all the preceding in its larger, verticillate leaves, 
and broad terminal corymb of several large handsome flowers. From Plumier's drawing, 
the stem has ternate branches, subscandent, with axils 4 in. apart; the lower leaves are 
opposite, the intermediate and terminal quaternately verticillate; they are ovate-ellipti e, 
oblong, subobtuse at the base, terminated by a short acumen, rigid, with entire margins, 
and arcuately conjoined nerves patently divaricate, 3-4 in. long, 13-1 in. broad, on 
Q. 
