44 GINKGOACEAE, 



Division SPERMATOPHYTA. Flowering Plants. 

 Subdivision GYMNOSPERMAE. Naked-Seed Plants. 



Family GINKGOACEAE. Ginkgo Family. 



A very ancient tree family, consisting of only the following 



of a single species, scarcely known except as cultivated. 



GINKGO. Maidenhair Tree. 



Rather large conical or irregularly branched deciduous tree 

 with- pale soft ductless wood without resin-passages, with very 

 fine medullary, rays; moderately stout often zig-zag rounded 

 twigs ; small angular spongy or fissured pith ; alternate low small 

 half-round leaf-scars with 2 bundle-traces; no stipule-scars; 

 round-ovoid rather small solitary sessile buds often developing 

 the first year; rather large fan-shaped simple long-stalked leaves, 

 many-veined 'from the base, mostly clustered on short spurs; 

 dioecious inconspicuous naked flowers, the staminate in catkins ; 

 and father large yellowish ill-scented drupe-like fruits. 



1. Leaves green. 2. 



Leaves variegated. G. biloba variegata. 



2. Weeping. G. biloba pendula. 

 Not weeping. 3. 



3. Leaves short-lobed. G. biloba. 

 Leaves deeply cut. G. biloba laciniata. 



Family TAXACEAE. Yew Family. 



A small family of trees and shrubs, of no great use except as 

 cultivated for evergreen specimens or masses : the wood of 

 classic use in archery. 



TAXUS, Yew. 



Evergreen shrubs or trees with rather hard reddish ductless 

 wood without resin-passages, with spirally marked tracheides ; 

 terete rather slender twigs ; alternate minute low crescent-shaped 

 leaf-scars with a single bundle-trace ; no stipule-scars ; narrowly 

 lanceolate often falcate small entire pointed leaves ; rounded buds 

 with numerous scales; monoecious cone-like naked flowers; and 

 solitary bony seeds each in a fleshy cup-like red or orange aril. 



