HORSE-CHESTNUT. 
(Marronier d’Inde, Fr.) 
Natural Order , Hippocastane;e, (Decand.) Linncean 
Classification , Heptandria, Monogynia. 
iESCULUS,f (Linn.) 
Calyx tubular-campanulate, 5-toothed. Petals 4 or 5, more or 
less unequal, unguiculate. Stamens 6 to 8, (often 7,) with 
separate filaments. Ovary roundish, 3-celled, with 2 collate- 
ral ovules in each cell. Fruit subglobose, coriaceous, even or 
echinate, 1 to 3-celled. Seeds solitary, large, with a broad 
hilum, and no albumen. Cotyledones subterraneous. 
Trees or shrubs of North America and temperate Asia, with 
opposite, digitate, serrated leaves. Flowers conspicuous, in ter- 
minal panicles, on articulated pedicels. 
§ 3. Fruit unarmed , leaves stipulate , the tube of the calyx 
at length cleft . — Calothyrsus. 
CALIFORNIAN HORSE-CHESTNUT. 
iESCULUS californic a; staminibus corolla longioribus , 
petalis 4, subxqualibus , calycibus tubuloso-campanulatis 
inxquali-de ntatis; thyrsus abbreviatis densifloris; petiolis 
marginatis , foliolis quinque ovato-lanceolatis subellipticis 
acutis serrulatis glabris glaucescentibus , basi rotundatis 
subcordatis . — Nutt, in Torr. and Gray. Flora N. Amer., 
1. p. 251. 
Calothyrsus Californica. Spach, in Ann. Sc. Nat. (ser. 2.) 
p. 62. 
This is the only species hitherto discovered of this 
ornamental genus, on the Western side of the American 
continent; and it differs from the ordinary type quite 
sufficient to constitute a separate section. 
f The Latin name of a tree which furnished an esculent nut. 
