384 ANACARDIACEiE. Rhus. 



R. glabra, L.^ (Smooth Sumach.) Shrub 3 to 15 feet high, glabrous at least up to the 

 iutloresceuce : leaflets mostly broadly lauceolate, acuminate, sharply serrate (2 or 3 inches 

 long), bright green above, glaucous-white beneath : fruit of the next or shorter-haired 

 (leaflets also sometimes laciniate.-) — Spec. i. 26.5 (Dill. Elth. t. 243) ; Lam. 111. t. 207, f. 1 ; 

 Marsh. Arb. 128 (but there are no varieties with "scarlet flowers") ; Torr. & Gray, Fl. i. 

 217 ; Gray, Gen. 111. ii. t. 159; Emerson, 1. c. ii. 572, with plate. R. Canadensis, Mill. Diet, 

 ed. 8. R. elegans, Ait. Kew. i. 366. — Open dry ground, Canada to W. Florida and Texas, 

 west to Brit. Columbia, E. Oregon, and mountains of Arizona. 



R. t^phina, L. (Common or Stag-horn Sumach.) Tall shrub or small tree with spread- 

 ing branches, these with petioles and inflorescence densely velvety-villous : leaflets lanceo- 

 late, acuminate, sharply serrate (2 to 4 inches long), thin, pale or whitish beneath, more or 

 less pubescent : fruit in a large and very dense crimson thyrse ; the velvety-hispid drupes 

 sharply acid. (Varies rarely with laciniate-dissected leaves or confluent leaflets, when it is 

 Datisca hirta, L. Spec. ii. 1037.) — Cent. PI. ii. 14, Amcen. Acad. iv. 311, & Spec. ed. 2, i. 

 380 ; Marsh. Arb. 129 ; Nouv. Duham. ii. t. 47 ; Torr. & Gray, 1. c. ; Emerson, 1. c. with plate.^ 

 R. hypselodendron, Mcench, Meth. 73. R. viridiflora, Poir. Diet. vii. 504.* — Fertile dry 

 soil. New Brunswick* to Minnesota, and along the mountains southward to Georgia and 

 Mississippi. Apparently hybridizes with R. glabra. 



R. pumila, Michx. Shrub one to three feet high, with procumbent base, soft-pubescent : 

 leaflets fewer, oval or oblong, commonly obtuse, strongly and unequally serrate, velvety 

 beneath (2 or 3 inches long) : thyrse more open.^ — Fl. i. 182; Pursh, Fl. i. 204; Torr. & 

 Gray, Fl. i. 217; Curtis, Cat. N. Car. 93; not Meerb.'^ — Pine woods and barrens, middle 

 upper country, N. Carolina to Georgia ; first coll. by Michaux. 



++ ++ Rhachis margined or winged between the firmer and coriaceous leaflets : copious 

 copalline juice from the stems : drupes with very short and fine pubescence. 



R. COpallina, L. (Dwarf Sumach.) Low shrub with running subterranean shoots, or 

 southward arborescent and 10 to 30 feet high, soft-pubescent or puberulent when young : 

 leaflets 9 to 23, oblong-ovate or oblong or oblong-lanceolate, from obtuse to acuminate, 

 entire or coarsely few-toothed, more or less inequilateral, the upper face at length shining ; 

 the purple rhachis below narrowly and between upper pairs of leaflets more broadly wing- 

 margined : thyrse comparatively open : flowers yellowish-tinged. — Spec. i. 266 ; Marsh. 

 Arb. 128 ; Lam. 111. t. 207, f. 3 ; Jacq. Hort. Schoenb. iii. 50, t. 341 ; Torr. & Gray, Fl. i. 217 ; 

 Engler, 1. c. 383, with vars. — Sterile and dry ground, but also in sandy bottom lands. New 

 England and adjacent Canada ^ to Minnesota, south to Florida, and Texas. 



Var. leucantha, DC. Leaflets lanceolate, not rarely falcate, mostly quite entire: 

 flowers white. — Prodr. ii. 68; Gray, PI. Lindh. pt. 2, 158. R. leucantha, Jacq. 1. c. t. 342. 

 R. copalUna, var. lanceolata. Gray, PI. Lindh. pt. 2, 158.^ — Dry sandy soil and limestone 

 bluffs, Texas to Florida. (Cuba.) 



-1— -t— LobAdium. Leaves pinnate or palmate or simple : flowers sessile or nearly so and 

 subtended by squamaceous chartaceous or coriaceous concave bracts within which is a 



1 A species very closely allied to (if not merely a low and greener form of) R. (jlahra is R. Caro- 

 LiNiANA, W. W. Ashe, Bot. Gaz. xx. 548, t. 37, "growing in old fields and low woods " of Central 

 N. Carolina. Tiie species appears to be unrepresented in the larger American herbaria, and an appli- 

 cation to its author has thus far secured neither the gift nor loan of authentic specimens. 



2 Var. LACiNiATA, Carnere, Rev. Hort. 1863, 7. 



3 Add Sargent, 1. c. 15, t. 102, 10.3. 



4 Add syn. R. hirta, Sudworth, Bull. Torr. Club, xix. 81, not Harv. 



5 Nova Scotia, ace. to Macoun. 



6 There has long been a doubt concerning the poisonous qualities of this species, and recent evi- 

 dence is also very conflicting. While Sargent, Gard. & For. viii. 404, asserts its extreme virulence, 

 Ashe, Bot. Gaz. xx. 549, states that the berries are innocuous, being greedily eaten by negro children 

 without ill effects. 



■^ Add syn. R. Michauxii, Sargent, 1. c. viii. 404, f. 55. 



8 Also at Lansdowne, Ont., Young, ace. to J. M. Macoun. Species said to be very rare in Canada. 

 Add lit. Sargent, Silv. iii. 19, t. 104, 105. 



9 Add Sargent, 1. c. 20, t. 106. 



