74 OLEACE^E. Fraxinus. 



Var. bradiyptera, a form with short obovate fruit, only half to three-fourths inch 

 long, and the terminal part of the wing only half the length of the body. Borax Lake, 

 California, Torre y. 



Var. trifoliolata, Torr. Leaves (only the uppermost known) 1-3-foliolate : leaflets 

 small, an inch or less long, coriaceous, obsoletely serrate : fruit rather small. Bot. Mex. 

 Bound. 1(37. Mountains south of the boundary between Upper and Lower California, 

 Parry. 



* * Petals (always ?) 4 : style none or hardly any : North Mexican and Texan species, with small 

 and minutely punctate leaflets, and small panicles chiefly terminating short 1-2-leaved lateral 

 branchlets: flowers of the second species unknown. 



F. CUSpidata, Torr. Shrub 5 to 8 feet high, with slender branches, glabrous : leaflets 

 5 to 7, lanceolate or ovate-lanceolate and gradually acuminate into a cuspidate tip, or 

 some of them ovate or oval and obtuse or even emarginate, acutely and sparsely few- 

 toothed or entire, petiolulate (half to a full inch or more in length) : petiole slightly mar- 

 gined between the leaflets : calyx deeply 4-cleft or 4-toothed : corolla 4-parted, half inch 

 long ; the lobes long-linear, several times exceeding the oblong anthers : stigma sessile : 

 fruit spatulate-oblong or obovate-oblong (half inch long), its wing rather shorter than the 

 flattened nerveless body. Bot. Mex. Bound. 166. South-western Texas, on the Rio 

 Grande from the great canon upwards, Purr//, Wriyht, &c., in fruit. New Mexico, Palmer, 

 in flower. 



F. Greggii, Gray. Shrub 5 to 9 feet high, glabrous, with slender mostly terete branches : 

 leaflets 3 to 7, from narrowly spatulate to oblong-obovate, obtuse, obtusely few-toothed or 

 entire, plane, firm-coriaceous, veinless or nearly so (a half to nearly an inch long), sessile : 

 petiole wing-margined between the leaflets : fruit to 8 lines long, oblong-linear, the retuse 

 apex tipped with a very short distinct style. Proc. Am. Acad. xii. 64. F. Schiedeana, 

 var. parvifolia, Torr. 1. c. On limestone, S. W. Texas, Schatt, c. Adjacent parts of 

 Mexico, Gregg, Bigelow, Parry. 



2. FRAXIN^STER, DC. Flowers apetalous, in mostly denser panicles (espe- 

 cially the staminate), which are developed from separate buds from upper axils of 

 the preceding year, or on the leafless base of shoots of the season. 



* Flowers polygamous : leaves mostly simple ! 



F. anomala, Torr. Shrub or low tree, more or less soft-pubescent when young: leaves 

 thin-coriaceous, ovate, rotund, or cordate, rarely obeordate, entire or partly serrate, many- 

 veined (an inch or two long), sometimes 2-3-foliolate with similar sessile leaflets : panicles 

 short: calyx campanulate, erose-toothed, longer than the ovary: anthers linear-oblong: 

 fruit oblong (7 to 10 lines long), winged from the base, the flattened striate-nerved body as 

 long as the terminal part of the wing. Watson, Bot. King, 283. S. Utah, Newberry, 

 Palmer, Bishop, &c. 

 * * Flowers dioecious ; the pistillate rarely w'th abortive stamens ; the staminate reduced to 2 or 4 



stamens with a minute or obsolete calyx "or none : leaves 3-11- (mostly 5-9-) foliolate. 

 H Leaflets petiolulate: anthers linear-oblong, mucronate or apiculate : small calyx to fertile 

 flowers present and persistent, sometimes deciduous in F. quadrangulata. 



-H- Fruit winged only from the summit or upper part of the terete or nearly terete body, 



= Which is inarginless ; the wing wholly terminal. 



F. pistacieefolia, Torr. Small tree, either velvety-pubescent or nearly glabrous : leaf- 

 lets 5 to 9, short-petiolulate, sometimes subsessile, small (one or two inches long), from 

 lanceolate to oval, entire or somewhat serrate: fruits small and crowded, spatulate (either 

 broadly or narrowly), the terete body (3 to 5 lines long) somewhat clavate, about equal- 

 ling and sometimes exceeding the Aving. Pacif. R, Rep. iv. 128, & Bot. Mex. Bound. 10(3. 

 S. W. Texas to Arizona. (Adjacent Mex.) 



Var. coriacea. A rigid form of arid districts : leaflets 3 to 5, firm-coriaceous, usually 

 more serrate. F. velutina, Torr. in Emory, Rep. 1848, 149, a velvety-tomentose form. 

 F. coriacea, Watson in Am. Nat. vii. 302, excl. pi. coll. Bit/flow. Arizona, Emory, Wheeler. 

 F. Americana, L. (WHITE ASH.) Large timber-tree : branchlets and petioles glabrous : 

 leaflets 7 to 9, from ovate to oblong-lanceolate, mostly acuminate, entire or sparsely serrate 

 or denticulate (3 to 5 inches long), pale or whitish and often pubescent beneath: fruit 

 usually about an inch and a half long ; the body oblong and cylindraceous, completely 



