CYRILLACEAE (CYKILLA FAMILY) 553 



scrambling over fences, walls, etc., or in woods climbing by rootlets to consid- 

 erable heights (var. RADicAXS (L.) Torr.), sparingly pubescent or glabrate ; 

 leaves pinnately o-foliolate, leaflets ovate to rhombic, mostly acuminate, entire, 

 crenulate, or irregularly and coarsely few-toothed, paler and with some persist- 

 ent or tardily deciduous pubescence beneath ; berries whitish or cream -colored, 

 subglobose, glabrous or nearly so, 5-6 mm. in diameter, in age sulcate. — 

 Abundant in hedgerows, thickets, and woods. June, July. — To many persons 

 poisonous to the touch. Passing on our western limits to a thicker-leaved 

 smoother form (JR. Eydbergi Small). 



Var. microcarpa Michx. Similar ; fruit 3-4 mm. in diameter, (i?. micro- 

 carpa Steud.) — Apparently local, w. Que. to Fla., and westw. 



6. R. quercifblia (Miciax.) Steud. (Poison Oak.) Erect, 3-5 dm. high : 

 leaflets broadly rhombic-ovate, conspicuously S-1-lobed, permanently and some- 

 what copiously pubescent beneath, rather firm in texture and somewhat veiny ; 

 fruit 4-5 mm. in diameter, at first pubescent, in maturity glsLhrsite hut papillose. 

 — Woods and barrens, Va., southw. and southwestw. 



§3. LOBAdIUM (Eaf.) DC. Floicers polygamo-dioecious, in small solitary 

 or clustered spikes or heads ichich develop in spring before the leaves ; leaves 

 S-foliolate; fruit as in the first groiip. Schmaltzia Desv. 



7. R. canadensis Marsh. Leaves soft-pubescent when young, becoming gla- 

 brate; leaflets rhombic-obovate or ovate, unequally cut-toothed. 2.5-7.5 cm. 

 long, the terminal one cuneate at base and sometimes 3-cleft ; flowers pale yel- 

 low. {B. aromatica Ait.) — Dry rocky banks, w. Vt. to Minn., and southw. — 

 A straggling bush, 1-2 m. high ; the crushed leaves not unpleasantly scented. 



Var. illinoensis (Greene) Fernald. Branchlets and petioles tomentuiose ; 

 2eaves permanently appressed-pubescent above, velvety beneath. {Schmaltzia 

 illinoensis Greene.) — Dry sandy banks, centr. 111. 



Var. trilobata (Xutt.) Gray. With smaller somewhat flabelliform and ob- 

 tusish leaflets, 1.5-2.5 cm. long, crenately few-lobed or incised toward the sum- 

 mit. — 111. (Hall), and common westw. — Unpleasantly scented. 



§4. COTINUS (Adans.) DC. Ovary becoming very gibbous in fruit, icith the 

 remains of the styles lateral ; flowers in loose ample panicles, the pedicels 

 elongating and becoming plumose ; leaves simple, entire. 



8. R. cotinoides Nutt. A tree, 8-12 m. high, glabrous or nearly so ; leaves 

 thin, oval, 7-15 cm. long. (Cotinus Britton.) — Wooded calcareous banks, s. e. 

 Mo. to Tenn. , and southw. , rare and local. — Flowers and fruit much as in the 

 cultivated Smoke-tree (i?. Cotinus L.), which is an occasional escape within 



our range. 



CYRILLACEAE (Ctrilla Family) 



Shrubs or small trees with alternate entire thickish leaves, no stipules, and 

 (4-)6-parted small regular and perfect flowers. Stamens hypogynous, 5 or 10, • 

 ichen 5 alternate with the petals. Ovary '2-b-celled ; cells l-A-ovided. Petals 

 (white or roseate) imbricated or convolute in bud, sessile or unguiculate. 

 Fruit a small corky drupe or tardily dehiscent pod. Flowers racemose-spicate. 



1. CYRILLA Garden. Leatherwood. Black Ti-ti 



Petals sessile. Stamens 5. attached with the petals under a disk ; anthers 

 somewhat sagittate. Ovary 2-i3-celled ; ovules anatropous or half-anatropous ; 

 cotyledons terete, small ; radicle superior. — Leaves oblanceolate, coriaceous, 

 evergreen or nearly so. (Named in honor of Dominico Cyrillo, professor of 

 medicine at Naples.) 



1. C. racemifldra L. Glabrous shrub, with shining somewhat veiny leaves 

 and innumerable small flowers in clustered racemes. — Edges of swamps, s. e. 

 Va., and southw. (W. I.; S. A.) 



