ASCLEPIADEZE. VIII. Tromortricue. 
hairy; segments of exterior corona, or ligule, obtuse, obso- 
letely tridentate; horns subulate, connivent : outer branches of 
inner corona ovate, obtuse. h. S. Native of the Cape of 
Good Hope. Stapélia paniculata, Jacq. stap. t. 61. Corolla of 
a livid green colour outside, glabrous, brownish purple, and 
beset with violaceous papille inside; hairs white. 
Panicled Tridentea. Fl. June, Sept. Clt. 1805. Shrub. 
Cult. For culture and propagation see Stapélia, p. 117. 
VIII. TROMO'TRICHE (rpopoc, tromos, tremor; Op% 
rpuxoc, thrix, trichos, a hair; in reference to the cilia of the 
corolla being tremulous.) Haw. syn. p. 36.—Stapélia species 
of authors. 
Lin. syst.  Pentándria, Digynia. Corolla smooth, revolute, 
ciliated with tremulous spatulate hairs. Segments of exterior 
corona, or ligule, connate at the base, horizontal, cuneate-rhom- 
boid and serrated; those of the inner corona unequally bifid ; 
inner branch recurved, longer and slenderer than the other, gra- 
dually thickened to the apex, whence it appears like a stigma.— 
Habit almost of the first section of Stapelia; but the branches 
are naked, and very glaucous, or rather pruinose, erectly decum- 
bent; the teeth distant, thick, horizontal, or a little recurved. 
1 T. xzvonLvU'rA (Haw. syn. p. 36.) branches tetragonal, 
glaucous, erect; corolla glabrous; but the segments are ciliated 
with spatulate glands, acute, and revolute ; ligula quadrate, ob- 
cuneated and retuse at top; outer branch of inner corona tooth- 
formed, acute. .S. Native of the Cape of Good Hope, in 
Karro, under bushes. Stapélia revolüta, Mass. stap. p. 12. t. 
10. Sims, bot. mag. 724. Branches floriferous at top. Pedi- 
cels solitary. Corolla pale, violaceous, ex Willd., greenish 
yellow outside, and purplish inside, ex Mass; dirty dark red, 
with a pale circle at the base of the lobes, ex Haw. suppl. pl. 
succ. p. 11. 
Revolute-flowered 'Tromotriche. 
Shrub 1 foot. 
2 T. crav'ca (Haw. syn. p. 37.) branches tetragonal, very 
glaucous; corolla glabrous; segments ovate, acute, revolute, 
fringed with clavate glands ; ligule bi-tridentate at apex. h. 
S. Native of the Cape of Good Hope. Stapélia glaüca, Jacq. 
stap. t. 10. Willd. enum. p. 279. Very like T. revolàta, in the 
mode of growth, colour, form, and corolla; but differs from it 
in the segments of the exterior corona being tridentate, ex 
Willd. Branches sometimes hexagonal, ex Jacq. Pedicels 
aggregate at the tops of the branches. Corolla livid green 
outside, and striated : blood-coloured inside ; with a white 
bottom ; ex Jacq. Lobes of outer corona obtuse, and a little 
emarginate at the apex: therefore the plants of Jacquin and 
Haworth are probably distinct. 
Glaucous Tromotriche. Fl. Ju. Nov. Clt. 1799. Sh. 1 to 2 feet. 
3 T. pruindsa (Haw. syn. p. 37.) branches bluntly tetrago- 
nal, erect, with recurved teeth; corolla with flat, ovate, pilose, 
or downy segments, the down appearing like powder; ligulæ ser- 
rated at top. * b. S. Native of the Cape of Good Hope, in the 
dry regions of Namaqua Land, among bushes. Stapélia pruindsa, 
Mass. stap. p. 24. t. 41. Corolla blackish, beset with white 
adpressed hairs, ex Willd. Stems purplish. Flowers small, 
solitary, twin, or tern, towards the tops of the -branches, pur- 
plish, ex Mass. Perhaps a species of Piaránthus. 
Pruinose-flowered Tromotriche. Fl. Ju. July. Clt. 1795. 
Shrub 14 foot. er 
4 T. osriquaA ; branches tetragonal, glaucous? corolla gla- 
brous; segments ovate-acuminated, bent, obliquely ciliated 
with clavate white or purple glands; ligule bidentate, acute. 
h. S. Native of the Cape of Good Hope. Stapélia obliqua, 
Willd. enum. suppl. p. 13. Corolla dirty yellow, marked with 
Fl. Ju. Sept. Clt. 1790. 
IX. Onzza. 119 
confluent, violaceous spots. Exterior corona greenish yellow, 
dotted at top, and furnished with a mark at the base. 
Oblique-flowered Tromotriche. Fl. Ju. Sept. 
Shrub 14 foot. 
5 T. vuscA' rA (Haw. suppl. pl. succ. p. 10.) branches tetra- 
gonal, erectish, glaucous-green; corolla glabrous; leaflets of 
outer corona 2-3-toothed ; shorter branches of inner corona ob- 
tuse. b. S. Native of the Cape of Good Hope. T. glaüca, £, 
Haw. syn. p. 37. Stapélia fuscàta, Jacq. stap. t. 55. Flowers 
brownish purple. Corolla pale at bottom, striated transversely 
with red; ciliated at top, with clavate, wine-coloured glands. 
Ligula dark brown. 
Brownish-flowered Tromotriche. 
Shrub } to 1 foot. 
Cult. For culture and propagation see Stapélia, p. 117. 
Clt. 1805, 
Fl. Ju. Nov. Cit. 1814. 
IX. O'RBEA (from orbis, an orb; the orb in the centre of 
the flower is very large and elevated.) Haw. syn. p. 38.— 
Stapélia species of authors. 
Lin. syst, Pentándria, Diginia. Corolla 5-cleft, starry, the 
whole of the inside corrugated, furnished with a large, elevated 
orb in the centre. Segments of outer corona, or ligule, 
long, spreading, bi or tridendate at the apex ; those of the inner 
corona unequally bifid; the inner branch recurved, longer than 
the outer one, style-formed, clavate, and stigma-formed at the 
apex.—Habit of the species of Podánthes; but the branches 
are more robust, and less effuse; and, when old, become de- 
cumbent and creeping: the teeth are smaller, and horizontal, not 
ascending. 
1 O. macuLosa (Haw. syn. 37.) corolla smooth, ciliated ; 
ligule tridentate ; orb convex, downy, ex Haw. h.S. Native 
of the Cape of Good Hope. Stapélia maculósa, Jacq. stap. t. 
31. Willd. enum. p. 283. Sims, bot. mag. 1833. Stap. mixta, 
Donn. hort. cant. Segments of corolla ovate, acute, dirty 
yellow, red at the apex and edges, almost covered by confluent, 
rufous, large spots. Orb waved, elevated, but small for the size 
of the flower. Ligula 2-3-toothed at top, brownish grey, pale 
at top, and marked by a large, distinct, brown spot, ex Haw. 
Spotted-flowered Orbea. Fl. Ju. Sept. Clt. 1804. Shrub 
1 foot. 
2 O. mixta (Haw. syn. p. 38.) corolla glabrous, with ovate, 
acuminated, wrinkled segments, an elevated, papillose orb, and 
bifid ligule. h. S. Native of the Cape of Good Hope. 
Stapélia mixta, Mass. stap. p. 23. t. 388. Flowers drooping, of 
an obscure violaceous colour, wrinkled with transverse yellow 
stripes, and a yellow orb, beset with brown papilla. Very nearly 
allied to O. variegdta; but differs in the form of the teeth of 
the branches, and in the flowers being twice the size, in the acu- 
minated segments, in the elevated, papillose orb, &c. 
Mixed Orbea. Fl. Ju. Sept. Clt. 1800. Shrub 1 foot. 
3 O. quineuene’Rvis (Haw. syn. p. 38.) corolla glabrous, ? 
5-nerved on both sides; segments roundish elliptic; ligule 
tridentate, middle tooth small; branches spotted with brown. 
h. S. Native of the Cape of Good Hope.  Stapélia quinque- 
nérvis, Roem. et Schultes, syst. 6. p. 37. Larger than O. 
variegata. — Corolline segments sulphur-coloured, less spotted 
than in O. bisálca; but having brown spots on both surfaces 
in certain places ; and the corolla, and exterior corona, are more 
deeply cleft than in O. bisálca. Ligule yellow, having a blood- 
coloured spot at the base, but with distinct brownish dots at the 
apex. 
Five-nerved-flowered Orbea. Fl. 
Shrub 1 foot. 
4 O. Bisu'tca (Haw. syn. p. 39.) corolla glabrous ; orb large; 
ligulee emarginate; branches thick, green. bh. S. Native of 
Ju. Sept. Clt. 1800. 
