CYEILLACEAE (CYJBILLA FAMILY) 553 



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

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

 leaves pinnately 3-foliolate, leaflets ovate to rhombic, mostly acuminate, entire, 

 crennlate, 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 (B. Bydbergi Small). 



Var. microcdrpa Michx. Similar ; fruit 3-4 mm. in diameter. (.B. micro- 

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

 1/(5. R. quercifblia (Michx.) Steud. (Poison Oak.) Erect, 3-5 dm. high; 

 leaflets broadly rhombic-ovate, conspicuously Z-l-lobed, permanently and some- 

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

 fruit 4-5 mm. in diameter, at fasX, pubescent, in maturity ^3hr&t% hut papillose. 

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



§3. LObAdIUM (Raf.) DC. Flowers polygamo-dioecious, in small solitary 

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

 3-foliolate ; fruit as in the first group. 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. (JJ. 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. illinoSnsis (Greene) Fernald. Branchlets and petioles tomentulose ; 

 leaves permanently appressed-pubescent above, velvety beneath. (Schmaltzia 

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



Var. trilobita (Nutt.) 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, with 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 (iJ. 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 

 ('i-)5-parted small regular and perfect flowers. Stamens hypogynous, 5 or 10, 

 when 5 alternate with the petals. Ovary 2-5-celled ; cells l~i-ovuled. Petals 

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

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



1. CYRiLLA Garden. Leatherwood. Black Ti-ti 



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

 somewhat sagittate. Ovary 2-;:i-oelled ; ovules anatropous or half-anatropous ; 

 cotyledons tereteT" small ; radicle superior. — Leaves oblanceolate, coriaceous, 

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

 medicine at Naples.) 



1. C. racemiflbra L. Glabrous shrub^ vrith shining somewhat veiny leaves 

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

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



