552 ANACAKDIACEAE (CASHEW FAMILY) 



1. FLOERKEA Willd. False Mermaid 



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 of 3 (or 1-2) roughish fleshy achenes. Seed anatropous, erect. — 

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

 cles. (Named for (riistav Heinrich FJorke, 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 o-merous Jloivers, hut 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. StiMAC 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. (Staghorn 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 Sud worth.) — Dry or 

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

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

 and bracts more or less deeply and laciniately toothed. ^ A frequent form, at 

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

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

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



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

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

 in dry soil, centr. Me., westw. and soutlnv. June, July. Forma laciniXta 

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



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

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

 the 0-21 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. Fl outers polygamous, in loose and slender axillary 

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

 dim-colored ; the style terminal; stone striate; leaves odd-pinnate or •t-foli- 

 olate, thin. (Poisonous.) ToxicoDENnRox Mill. 



4. R. Vernix L. (Poison S. or Dogwooi>.) Shrub, 2-5 in. high, smooth or 

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

 w. >Ie. to w. Ont., and southw. June. —Our mo.st poisonous species; also 

 called Poison Eldkh. 



5. R. Toxicodendron L. (Poison Ivy. Poison Oak.) Suberect and bu.shy, 



