IIaxdbook of Tkeks of the XoirniEKX States \yu Canada, 455 



species nro rmiiiil wilhin tin- T'nitcd States, all arborescent though one is more commonly a 

 shrub than a tree. 



Leans (Icciduous, odd-iuiniatcly coinpound. ix'tiolate; leaflets cnn(lui)licate in the burl and 

 usually srrrate. Fluiicrii in early sprin.ij. ivi>in the axils of the leaves of the previous season, 

 mostly (li(ecious or polygamous (occasionally perfect) in fasciculate panicles; calyx small, 

 canipanulate or none: corolla 2-4-parted or none; stamens usually 2 with short terete filaments 

 and large oblong anthers opening by lateral slits; ovary mostly 2-celled \vith single style and 

 2-lobed stigma. Fruit a samara, with terete or somewhat flattened and usually 1-seeded body 

 and terminal wing ; seed elongated, pendulous. 



Fraxiiius is the ancient Latin name of the Ash-frcc. 



KEY TO THE SPECIES. 



a Samara with seed-bearing portion flattened and wing extending the entire length 



b r>ateral leaflets sessile; calyx in the fertile flowers none F. nigra. 



h- Lateral leallets stalked: calyx present 



Samara obo\ate to spatulate ; twigs terete F. Caroliniana. 



Samara elliptic to spatulate ; twigs 4-sided F. quadrangulata. 



a- Samara with seed-bearing portion subterete : wing not extending to base; leaflets stalked:, 

 calyx present in fertile flower 

 b Wing almost entirely tin-minal — slightly if at all decurrent on body 



c Leaves and branchlets glabrous or nearly so F, Americana. 



c- Leaves ben(\ith and branchlets pubescent F. Biltnioreana. 



V Wing decurrent somewhat on sides of body but not to base 

 c Wing of samara spatulate 



d IJranchlets and !ea\es glabrous or nearly so; leaves green beneath. 



F. lanceolata. 

 d- Branchlets and petioles velvety pubescent 



Samara less than 2 in. long : calyx small F. Pennsylvanica. 



Samara mostly 2 in. long or more ; calyx enlarged F. profunda. 



c^ Wing of samara long-linear F. Darlingtonii. 



For species see pp 38.'i-399 and the foUoicing: 



Darlington Asir. F. Darlincjtomi Britt. This is a little known species d(»scribed from 

 material from Lancaster, Pa,, and is similar to the F. lanceolata and F. Peiiusi/lrauira. with 

 foliage and twigs pubescent or glabrate and samara 2-3 in. long with linear wing decurrent 

 upon the seed-bearing portion one third to one fourth its length. 



THE FRIXGE-TREES. Gexus CHIOXAXTHUS L. 



Trees or small shrubs of two species one of the middle and southern United States and 

 the other of China. 



Leaves simple, deciduous, opposite, conduplicate in the bud. Flowers perfect or poly- 

 gamous, white, in loose drooping panicles from the axils of the leaves of the preceding s?ason : 

 calyx small, 4-parted, inferior, persistent : corolla of 4 linear white petals slightly united at 

 base : stamens 2, inserted on the base of the corolla, with very short terete filaments and ovate 

 apiculate anthers; ovary ovoid with short columnar style and thick fleshy 2-lobed stigma: 

 ovules 2 in each cell, pendulous. Fruit an ovoid or oblong drui)e tipped with the remnants of 

 the style, nearly black thick skin, dryish flesh and usually 1 but sometimes 2 or .'! thitk-walled 

 crustaceous stones. 



The name is from two Greek words meaning snow-flower. 



For species see pp. .'ftiO-.'/Ol. 



THE FORESTIERA. Genus FORESTIERA Pom. (ADELL\ P. Br.) 



Shrubs or small wide-branching trees of about fifteen species natives of America. Six or 

 8 species are found in the southern United States, one of these only attaining the dignity of a 

 tree, and that ranging as far north as southern Illinois. 



Leaves simjile. op])Osite. deciduous or rarely evergreen, and usually small. Floirers small 

 and mostly polygamous, yellowish or greenish, dio'cious. aijpearing before the lea\-es in fas- 

 cicles or racemes from scaly buds in the axils of the leaves of the jirevious year: calyx witli 

 very short tube and 4-.~ unequal lobes : corolla none or with 1 or 2 deciduous petals : stan-'e:is 

 2-4 with extrorse anthers: ovary ovoid. 2-celled. with slender style and thick usually 2-lobe(l 

 stigma and 2 pendulous ovules in each cell. Fritit a druiii> with 1 or 2 seeds with membranous 

 testa and fleshy albumen. 



The name is in compliment to M. Forestier. a French physician. 



For specie s see pp. .'fO^-'iHi. 



