652 ANACAKDIACEAE (_CASHBW FAMILY) 



1. FLO^RKEA Willd. False Meemaid 



Sepals 3. Petals 3, shorter than the calyx, oblong. Stamens 6. Ovaries 3, 

 opposite the sepals, united only at the base ; the style rising in the center ; stig- 

 mas 3. Fruit o£ 3 (or 1-2) roughish fleshy aohenes. Seed anatropous, erect. — 

 Small and inconspicuous herbs, with minute solitary flowers on axillary pedun- 

 cles. (Nauied for Gustav Heinrieh Florke, a German botanist.) 



1. F. proserpinacoides Willd. Leaflets 3-5, lanceolate, sometimes 2-3-cleft. 

 — Marshes and river-banks, w. Que. to Del., Ky., and westw. Apr.-June. — 

 Taste slightly pungent. 



ANACARDlACEAE (Cashew Family) 



Trees or shrubs, with resinous' or milky acrid juice, dotless alternate leaves, 

 and small often polygamous regular b-merous flowers, but the ovary 1-celled and 

 1-ovuled, with 3 styles or stigmas. — Petals imbricated in the bud. Fruit mostly 

 drupaceous. Seed without albumen, borne on a curved stalk that rises from the 

 base of the cell. Stipules none. Some species pervaded by an exceedingly ac- 

 tive poisonous principle. 



1. RHUS L. Sumach 



Calyx small, 5-parted. Petals 5. Stamens 5, inserted under the edge or be- 

 tween the lobes of a flattened disk in the bottom of the calyx. Fruit small and 

 indehiscent, a sort of dry drupe. — • Leaves usually compound. Flowers green- 

 ish-white or yellowish. (The old Greek and Latin name.) 



§ 1. SXjMAC DC. (in part). Flowers polygamous, in a terminal thyrsoid pan- 

 icle; fruit globular, symmetrical, clothed 'with acid crimson hairs; stone 

 smooth; leaves odd-pinnate. (^Not poisonous.) 



1. R. typhina L. (Staguorn S.) Shrub or tree, 1-10 m. high, with orange- 

 colored wood; branches and stalks densely velvety-hairy; leaflets 11-31, pale 

 beneath, oblong-lanceolate, pointed, serrate. (B. hirta Sudworth.) — Dry or 

 gravelly soil, e. Que. to Ont., s. to Ga., Ind., and la. June, July. — Apparently 

 hybridizes with the next species. Forma LACiNiiTA (Wood) Rehder. Leaflets 

 and bracts more or less deeply and laciniately tooth-ed. — ■ A frequent fomi, at ' 

 least in some cases pathological and with inflorescence transformed in part into 

 contorted bracts (the Datisca hirta of L.). Forma dissecta Rehder. Leaves 

 bipinnatifid to bipinnate. — An occasional form, now in cultivation. 



2. R. glabra L. (Smooth S.) Smooth glaucous shrub, 6-30 dm. high; 

 leaflets 11-31, whitened beneath, lanceolate-oblong, pointed, serrate. — Common 

 in dry soil, centr. Me., westw. and southw. June, July. Forma laciniata 

 (Carr.) Robinson. Leaves laciniately bipinnatifid to bipinnate. — Pa. and Del. 



3. R. copallina L. (Dvvaep S.) Shrub, 0.3-2 or (especially southward) 

 even 10 m. high ; branches and stalks downy ; petioles wing-margined between 

 the 9-21 oblong or ovate-lanceolate often entire leaflets, which are oblique or 

 unequal at the base, smooth and shining above. — Rocky hills, s. Me., southw. 

 and westw. July. 



§ 2. VENENAtaE Engl. Flowers polygamous, in loose and slender axillary 

 panicles; fruit symmetrical, globular, glabrous or pubescent, whitish or 

 dun-colored ; the style terminal ; stone striate ; leaves odd-pinnate or H-foli- 

 olate, thin. (Poisonous.) Toxicodendron Mill. 



4. R. V^rnix L. (Poison S. or Dogwood.) Shrub, 2-6 m. high, smooth or 

 nearly so ; leaflets 7-13, obovate-oblong, entire. (iJ. venenata DC.) —Swamps, 

 w. Me. to w. (Int., and southw. June. ^ Our most poisonous species; also 

 called Poison Ei.nnii. 



5. R. Toxicodendron L. (Folson Ivv, Poison Oak.) Suberect and bushy, 



