ANACARDIACE^:. (CASHEW FAMILY.) 69 



* Flowers polygamous, in a dose terminal panicle : drupe red, hairy : leaves pinnate. 



(Not poisonous.) 



1. R. typhina, L. Branches, petioles, and drupes villous ; leaflets 17-21, 

 lanceolate, acuminate, serrate, smooth, pale beneath. Dry hill-sides, Mississippi 

 to North Carolina, and northward. June and July. A shrub or small tree. 



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

 late, serrate, acuminate, white beneath. Open woods in dry rich soil, West 

 Florida to Mississippi, and northward. July. A shrub 6 - 10 high. Peti- 



f olcs terete. 



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

 tomentose ; leaflets 9-21, lanceolate or ovate-lanceolate, acute or obtuse, mostly 

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

 ing. Margins of fields and open woods, Florida to Mississippi, and northward. 

 July and 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, pale and tomentose 

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



* * Flowers dioecious, in loose axillary panicles : drupe whitish, smooth : leaves pin- 



nate 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 long- 

 peduncled, narrow, erect. (R. Vernix, L.) Swamps, Florida to Mississippi, 

 and northward. July. A shrub 8 - 12 high. 



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

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

 small, spreading. 



Var. 1. quercifolium, Michx. Stems low, erect ; leaflets mostly vari- 

 ously lobed. Dry pine barrens. 



Var. 2. radicans, Torr. Stems climbing by rootlets ; leaflets toothed or 

 entire, rarely lobed, more or less pubescent. Swamps, Florida to Mississippi, 

 and northward. July. 



* * * Flowers dioecious, in loose panicles : drupe oblong, smooth, scarlet : nut char- 



taceous : seeds arillate : leaves pinnate. 



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

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

 calyx-lobes yellowish-white ; petals and stamens 5. South Florida. A tree 

 15 -20 high. 



* # # * Flowers dioecious, in short bracted spikes, appearing with the leaves : drupe 



red, hairy : leaves trifoliolate. 



8. R. aromatica, Ait. Stem low, smooth ; leaflets ovate, or the termi- 

 nal one obovate, obtuse, pubescent when young, toothed above the middle ; 

 spikes single or clustered, spreading. Dry open woods, West Florida to Mis- 

 sissippi, and northward. March and April. Shrub l-2 high. Spikes 1' 

 long. Plant aromatic, not poisonous. 



