FLORA OF ADEN. 
• 24*2 
part of the style, 2-celled, the margins of the anthers or their basal pro- 
longations below the cells more or less horny and wing-like (anther-wings), 
the adjacent wings of each pair of anthers nearly meeting and forming 
narrow fissures leading to the stigmatic cavities ; pollen forming 1 or 
2 granular or waxy masses (pollinia) in each cell, the pollinia of the 
adjoining cells of two contiguous anthers united in pairs or fours either 
directly or by appendages (caudicles) to each of the 5 minute turgid 
or 2-fid bodies (pollen -carriers or corpuscles) which lie on the dilated 
part of the style. Ovary superior, of 2 one-celled distinct carpels 
enclosed within the stamina! column, with their styles united above 
into a disk which is 5 -angled, or produced beyond the anthers into a long 
or short simple or bifid column ; ovules usually numerous, anatropous, 
pendulous, imbricate in several series on the projecting placenta. 
Eruit a pair of follicles ; the seeds usually crowned by a tuft of hairs. 
Endosperm slight, cartilaginous ; radicle superior ; cotyledons flat. 
Genera about 220 ; species about 1,800. 
Distribution : — Mostly confined to the tropics, but a few in temper- 
ate regions . 
Corona corolline 
Gynostegium sessile or short-stipifcate . t .1. Glossonema. 
Gynostegium distinctly stipitate . . .4. Steinlieilia, 
Corona staminal 
Stem erect 
Shrubs or trees, with many leaves 
Leaves linear-lanceolate or linear 
Leaves broad 
Herbs, leafless or almost so . 
Stem twining 
Leaves not cordate 
Leaves cordate .... 
. 7. Ivanahia. 
. 2. Calotropis, 
. 6. Caralluma. 
. 3. Pentatropis. 
. 5. Dsemia. 
X. Glossonema Dene. 
Dwarf perennial, rarely annual herbs, often hoary, branched from the 
base. Leaves opposite. 
Flowers in few-flowered lateral or sublateral cymes arising from 
between the base of the petioles, rarely solitary. Galyx 5-partite. 
Corolla subcampanulate ; lobes 5, overlapping to the right; corona arising 
from the corolla-tube, of 5 broad hyaline lobes alternating with the 
corolla-lobes. Staminal column short ; anthers terminated by an inflexed 
membrane ; pollen-masses pendulous, solitary in each anther-cell, attached 
in pairs to the pollen- carriers by very short caudicles. Style-apex 
usually exserted beyond the anther, fleshy conical, clavate or peltate 
