Tenaris. | ASCLEPIADEZ (Brown). 795 
XXXVII. TENARIS, E. Meyer. 
Calyx 5-partite. Corolla-tube very short ; lobes 5, linear, linear- 
spathulate or filiform, spreading or ascending, valvate or replicate- 
valvate in bud. Corona small, double, arising from the staminal 
column above its base; outer corona of 5 small concave lobes or 
minute pouches, more or less spreading, alternating with the 
anthers; inner corona of 5 linear, subulate or filiform lobes, 
incumbent on the backs of the anthers and shorter than, equalling 
or exceeding the latter. Staminal column arising from the base of 
the corolla, very small, included in the corolla-tube ; anthers 
inflexed upon the style-apex, without an appendage or rarely with 
a very short one. Pollen-masses minute, subascending or sub- 
horizontal, solitary in each anther-cell, with a pellucid linear area 
close to the apex, attached in pairs to the very minute pollen- 
carriers by very short slender caudicles at their middle or near 
their base.  Style-apex usually shortly conical and acute, rarely 
comparatively large and obtuse. Follicles erect, somewhat diverging, 
slender, smooth. Seeds crowned with a tuft of hairs. 
Perennial herbs with tuberous rootstock ; stems slender, erect ; leaves opposite, 
linear or filiform ; inflorescence leafless and terminal, racemose or paniculate, 
or the flowers 1-8 together in sessile or pedunculate fascicles or in long slender 
racemes, lateral at the nodes of the terminal and leaf-bearing part of the stem. 
Disrris. Species 7, the others in Tropical Africa. 
Corolla-lobes linear-spathulate, 3-14 lin. broad at the 
apex, pink : 
Flowering part of the stem leafless and bractless or 
with some bracts 3-1 lin. long ; sepals lanceolate... (1) rubella. 
Flowering part of the stem with subulate or filiform 
bracts 1-6 lin. long ; sepals filiform-subulate from 
a broader base abe ca : ae ... (2) simulans. 
Corolla-lobes filiform or linear-filiform, } lin. broad, 
purple-brown on the inner face; flowering part of 
stem with leaves : 
Flowers in fascicles of 8-5 at the nodes ; inner corona- 
lobes shorter than or subequalling the anthers ... (3) chlorantha. 
Flowers in slender 2-6-noded racemes ; inner corona- : 
lobes much longer than the anthers cee ... (4) filifolia. 
oe 
1. T. rubella (E. Meyer, Comm. 198) ; tuber depressed, 1-1} in, 
in diam.; stem 4-13 ft. high, solitary, slender, simple or with 
1 branch, leafless on the flowering part, glabrous ; leaves in 3-6 
pairs, ascending or erect, 1-2} in. long, 3-1 lin. broad, linear, acute, 
glabrous ; flowers in 1 or 2 sessile or pedunculate pairs or sometimes 
a fascicle like whorl of them at the upper nodes, forming a terminal 
leafless and often bractless raceme or narrow raceme-like panicle, 
glabrous in all parts, with the internode next below it peduncle-like 
and 14-5 in. long; peduncles or branches of the panicle 0—} in, 
