652 ANACARDIACEAE (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 Gustav Hrinrich 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. 



ANACARDIACEAE (CASHEW FAMILY) 



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

 and small often polygamous regular o-merous flowers, but the ovary l-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. STjMAC DC. (in part). Flowers polygamous, in a terminal thyrsoid pan- 

 icle; fruit globular, symmetrical, clothed icith 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. (R. h irta Sud worth.) Dry or 

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

 hybridizes with the next species. Forma LACIMATA (Wood) Kehder. 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 Render. 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 LACIXI.\TA 

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



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

 even 10 in. 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 axiUary 

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

 dun-colored; the style terminal; stone striate ; leaves odd-pinnate or 3-/oK- 

 olate, thin. (Poisonous.) TOXICODENDRON Mill. 



4. R. VSrnix L. ( POISON S. or DOGWOOD.) Shrub, 2-5 m. high, smooth or 

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

 w. Me. to w. Ont., and southw. June. Our most poisonous species; also 

 called POISON ELDER. 



5. R. Toxicodendron L. (POISON Ivy, POISON OAK.) Suberect and bushy, 



