260 LXXXV. ASCLEPIADEX (BROWN). | Tacazzea. 
9. TACAZZEA, Decne.; Benth. et Hook. f. Gen. Pl. ii. 745. 
Calyx 5-partite. Corolla 5-lobed almost to the base, rotate or 
campanulate ; lobes overlapping and often slightly twisted to the left. 
Corona of 5 lohes, arising from the corolla at the base of the stamens 
and often shortly adnate to their filaments, alternating with the corolla- 
lobes, filiform or linear, simple or divided above into 2 or 8 filiform 
segments. Stamens inserted at or near the base of the corolla; fila- 
ments free above, usually more or less combined at their base with 
an inner series of 5 minute subquadrate emarginate or bifid alter- 
nating lobules into a ring or very short tube; anthers attached at 
their base to the dilated part of the style, and connivent over it in 
a cone, with cohering tips, glabrous. Pollen granular. Style shorter 
than the anthers, conical at the apex.  Follicles diverging. Seeds 
crowned with a tuft of hairs.—Twining or erect shrubs with milky 
juice. Leaves opposite or whorled. Stipules usually represented by a 
transverse line connecting the petioles, rarely toothed. Flowers small, 
in axillary, paniculate or corymbose cymes, usually from both axils.— 
Leptopetia, Harvey, Gen. South Afr. Pl. ed. 2, 231.  Zchmolepis, 
Decne. ; Benth. et Hook. f. Gen. Pl. ii. 741. 
Species about 14, confined to Tropical and South Africa. 
The flowers of most of the species are very similar in appearance and structure, 
and it is difficult to obtain distinctive characters from them, In most of the species 
the veins of the leaves are densely reticulate, and the midrib often has a series of appa- 
rently fleshy processes or glands scattered along the upper side, Z’acazzea is very closely 
related to Periploca and Raphionacme, and technically can only be distinguished 
f1om the former by the glabrous anthers. The fleshy processes on the midrib, however, 
do not occur in Periploca. In Bentham & Hooker’s Genera Plantarum, Tacazzeais 
said to differ from Periploca by the inflorescence arisin g from both axils of the opposite 
leaves, whilst in Periploca it arises from one axil only ; but this character does not 
hold good, as 3 out of the 10 or 11 species of Periploca have cymes arising from 
both axils, whilst in Tacazzea they sometimes arise from one axil only of each pair 
of leaves. The habit and taller and more woody stems of Tacazzea readily dis- 
tinguish it from Raphionacme, besides which, the short united part of the corolla 
does not form a distinct campanulate tube as in Raphionacme ; in the latter genus, 
however, there are one or two species without a distinctly campanulate tube to the 
corolla, and then there is nothing but habit to distinguish the two genera ; this is s0 
distinct, however, that once properly recognised, it can never be mistaken. 
Leaves linear or linear-lanceolate. 
Leaves less than 1 lin, broad; coronal-lobes divided 
into 3 long filaments é : : : . L. Z. africana. 
Leaves 3-4 lin. broad; coronal-lobes subulate, un- : 
divided, short é . 4. TZ. rosmarinifolia. 
Leaves not linear ner linear-lanceolate, varying from 
3-4 in. broad, 
Leaves of the exceedingly short lateral flowering 
shoots fascicled, small, partly concealing the 
small 1—4-flowered cymes : : . . 2. 7. volubilis. 
Leaves of the flowering shoots in distant pairs or 
whorls, of moderate size or large; cymes or 
panicles 6- to many-flowered. 
