^sculus 209 



yEsculus plantierensis, Andr^, a supposed hybrid between ^Esadus carnea and 

 yEsculns Hippocastamim, will be mentioned under the former species. Aisadus 

 versicolor, Dippel, a hybrid between yEsadtis Pavia and Aiscuhis octandra, will be 

 treated under the latter species. 



The following key to the species in cultivation is based on the characters of the 

 leaves and buds. In Plate 61 the leaves of all these species are shown ; and in 

 Plate 62 are represented the twigs and buds of six species, viz., Hippocastaimm, 

 carnea, indica, glabra, octandra, and calif arnica : — 



A. Leaflets sessile or nearly so ; buds very viscid. 



1. Aisculus Hippocastamim. 



Petioles glabrescent. Leaflets obtusely and irregularly serrate. 



2. ^sctdus turbinata. 



Petioles pubescent, especially towards their tips. Leaflets regularly and 

 crenately serrate. 



B. Leaflets stalked. 



*Buds viscid. 



3. yEsculus indica. 



Leaflets finely and sharply serrate, pale beneath. Buds very viscid. 



4. yEsctdus carnea. 



Leaflets obtusely and irregularly serrate. Buds only slightly viscid, the brown 

 scales having a dark-coloured margin. 



5. ^sculus californica. 



Leaflets shallowly and crenately serrate, pale beneath. Buds viscid, glisten- 

 ing with white resin. 

 ** Btids not viscid. 



6. yEscuhis parvifora. 



Leaflets densely grey-tomentose beneath, finely serrate in margin. Buds 

 minutely pubescent. 



7. yEsc2ilus octandra. 



Leaflets pubescent beneath, broadly lanceolate, shortly acuminate, with twenty 

 or more pairs of nerves in the terminal leaflet ; margin finely serrate 

 but not usually ciliate. Petioles without jagged marginal ridges. 



8. /Esculus glabra. 



Leaflets glabrous beneath, except for a slight pubescence along the midrib and 

 tufts in the axils, long-acuminate, with about fifteen pairs of nerves in the 

 terminal leaflet, finely serrate with ciliate tufts in the bases of the serrations. 

 Petioles with smooth marginal ridges, 

 g. yEsctihcs Pavia. 



Leaflets slightly pubescent beneath, narrowly lanceolate, finely serrate but not 

 ciliate in margin. Petioles flattened on the upper side, with marginal 

 sharp ridges, usually jagged. 



II c 



