226 
ADOXACEAE 
Adoxaceae. Dicotyledons (Sympet. Rubiales). Only genus Adoxa 
(q.v.). Bentham and Hooker unite the order with the Caprifoliaceae, 
and other authors place it near to the Saxifragaceae. Its relationships 
to any order are not very close (see Schumann, Morph . Studien). 
Aechmea Ruiz et Pav. Bromeliaceae (i). 50 sp. epiphytes, W. Ind. 
and S. Am. 
Aegiceras Gaertn. Myrsinaceae (iv). 1 sp. A. majus , trop. Old 
World. It grows in mangrove swamps together with Rhizophora, 
&c. , and exhibits a similar habit, vivipary, &c. 
Aegilops Linn. = Triticum L. 
Aegiphila Jacq. Verbenaceae (iv). 30 sp. trop. Am. 
Aegle Correa. Rutaceae (x). 2 sp. Indo-mal. 
Aegopodium Knaut. Umbelliferae (5). 2 sp. Eur., As. (1 Brit.). 
Aegopogon Beauv. Gramineae (in). 2 sp. Braz. to Calif. 
AeridesLour. Orchidaceae (31). 15SP.E. As. Epiphytes ; leaves fleshy. 
Aeschynanthus Jack. ( Trichosporum Don.) Gesneraceae (1). 70 sp. 
Indo-mal., China. Many are epiphytes with fleshy leaves. The 
flrs. show extreme protandry with movement of the sta. The seeds 
are provided with long hairs. 
Aeschynomene Linn. Leguminosae (in. 7). 50 sp. trop. (Herminiera 
is often united with A., e.g. in Nat. PJl.) 
Aesculinae. A cohort in Eichler’s (Warming’s) classification (p. 137)- 
Aesculus Linn, (including Pavia Poir. and Billia Peyr.) The only 
genus of Hippocastanaceae. 16 sp. N. temp, and Venezuela, &c. 
A. Hippocastanum L. is the horse-chestnut, which, with several sp. 
of the sub-genus Pavia, is commonly grown as an ornamental tree. 
A. ohioensis Michx. (= glabra Willd.) is the Buckeye of the U.S. 
They are trees with very large winter buds, covered with resinous 
scale leaves and containing the next year’s shoot in a very advanced 
state^including the infl.). The bud expands very rapidly in spring. 
In A. parviflora Walt, transitions from scales to perfect leaves may 
be seen, showing the former to be the equivalent of leaf-bases. The 
leaves are opp. exstip. palmate; the blades when young hang down- 
wards and are hairy. The infl. is mixed, the primary structure being 
racemose, but the lateral branches cymose (cincinni). The upper 
flowers are $ , with rudimentary ovary, and open first. The $ 
flowers are protogynous, and when they open the ripe stigma protrudes 
whilst the sta. are bent down ; later on these move up to a level with 
the style. Self-fert. may occur. The chief visitors are bees. On 
the corolla when young are yellow spots, which later on turn red (cf. 
Fumaria, Diervilla, &c.). The formula of the flr. is Iv (5); C 5 or 
4 zygom. ; A 8-5 introrse ; disc extrastaminal, often one-sided. G(3J» 
3-locuiar, with 2 ovules in each loc. Fruit a leather} 7 capsule, usually 
one-seeded, 3-valved. Seed large exalbuminous. (Cf. this fruit with 
that of Castanea.) 
Aethionema R.Br. (inch Eunomia DC. ). Cruciferae (11. 6). 50 sp. Medit. 
