72 



ANACAEDIACE^E. (CASHEW FAMILY.) 



2. R. glabra, L. Smooth and glaucous; leaflets 17 - 31, oblong-lanceo- 

 late, serrate, acuminate, white beneath. Opeu woods in dry rich soil. Julv. 

 A shrub 6 - 10 high. Petioles terete. 



3. R. copallina, L. (SUMACH.) Branches and wing-margined petioles 

 tomeutose ; leaflets 9-21, lanceolate or ovate-lanceolate, acute or obtuse, 

 mostly entire, smooth above, paler and downy beneath; panicle often large 

 and spreading. Margins of fields and open woods. July -August. A 

 shrub or small tree. 



4. R. pumila, Michx. Low, procumbent ; branches and petioles tomen- 

 tose; leaflets 11 -13, oval or oblong, acute, coarsely serrate, pah- and tomeu- 

 tose beneath. Pine barrens, Georgia to North Carolina. Branches 1 high. 



* * Flowers dioecious, in loose axillary panicles : drupe whitish, smooth : leases 



pinnate and trifoliolate. (Juice poisonous.) 



5. R. venenata, DC. (POISON ELDER.) Smooth ; leaves pinnate ; leaf- 

 lets 7-13, ovate or oblong, abruptly acute or acuminate, entire; panicles 

 loug-peduncled, narrow, erect. (R. Vernix, L.) Swamps. July. A shrub 

 8 -12 high. 



6. R. Toxicodendron, L. (POISON OAK, POISON IVY.) Branches 

 and petioles smooth ; leaves trifoliolate ; leaflets ovate or oblong-ovate ; pani- 

 cle small, spreading. 



Var. quercifolium, Michx. Stems low, erect; leaflets mostly vari- 

 ously lobed. Dry pine barrens. 



Var. radicans, Torr. Stems climbing by rootlets ; leaflets toothed or 

 entire, rarely lobed, more or less pubescent. Swamps. July. 



* * # Flowers dioecious, in loose panicles: drupe oblonq, smooth, scarlet: nut 



cltartaceous : seeds arillate : leaves p/nuute. 



7. R. Metopium, L. Smooth ; leaflets 3 - 7, coriaceous, long-stalked, 

 ovate or elliptical, acuminate, entire; panicle narrow, as long as the leaves; 

 cal vx lobes vellowish white ; petals aud stamens 5. South Florida. A tree 

 1 5 - 20 hih. 





* * * * Flowers ditrcious, in short bra'cted spikes, appearing with the leans: 

 ifri/jie red, hairy : leaves trifoliolate. 



8. R. Canadensis, Marsh. Stem low, smooth; leaflets ovate, or the 

 terminal one obovate, obtuse, pubescent when young, toothed above the mid- 

 dle ; spikes single or clustered, spreading. Dry open woods in the upper 

 districts. March- April. Shrub l-2 high. Spikes 1' long. Plant 

 aromatic, not poisonous. 



***** Flowers perfect, in-an opm, panicle, the pedicels mostly abortive, 



eloHt/atiiirj, am/ jii/nnose : drupe smooth. 



9. R. COtinoides, Xntt. Smooth ; leaves simple, membrauaceous, oval, 

 obtuse, entire, acute at the base, the upper ones long petioled ; panicle nearly 

 sessile, narrow, with erect branches; flowers minute. Alabama (Buckley, 

 Mohr). Leaves, with the petiole, 3' -4' long. 



