110 DESCRIPTIONS OF THE SHRUBS 



* Leaves deciduous, composed of many (7-31) blades ("or twice-pin- 



nate). (B.) 

 B. Stem of leaves winged between the blades ; fruit red. (C.) 

 C. Blades (9-21) about entire, smooth above ; berries hairy. 



Mountain Sumach (115) — Rhus copallina. 

 C. Blades (9-21) finely toothed, brown-hairy beneath. Japan 



Sumach — Rhus semial^ta (R. Osb^ckii). 



C. Blades (11-15) coarsely toothed, leaf-stem hairy. European 

 or Elm-leaved Sumach (116) — Rhus Cori^ria. 



B. Stem of leaves without wings between the blades. (D.) 



D. Blades (7-15) without notches, smooth on both sides ; berries 

 white ; plants very poisonous to the touch. (E.) 



E. Berries small, pea-like ; in moist ground. Poison Sumach 



(119) —Rhus V^rnix (R. venenata). 



E. Berries large — cherry-like ; from Asia. Lac Sumach 

 — Rhus succed^nea. 



D. Blades (11-13) sharply serrate ; not poisonous ; berries red ; 

 stem smooth. (F.) 



F. Blades regularly serrate ; shrub to 15 feet. Smooth Sumach 



(120) — Rhus glabra. 



F. Blades deeply and irregularly cut ; shrub to 8 feet. Cut- 

 leaved Sumach (121) — Rhus gl^ibra lacini^ta. 



D. Blades hairy beneath ; berries red. (G.) 



G. Stem velvety -hairy ; tall, 10-30 feet. (H.) 



H. Blades (11-31) regularly notched. Staghorn Sumach 



(114) —Rhus typhina (R. hfrta). 

 H. Blades deeply and irregularly cut. Fern-leaved Sumach 

 (122) — Rhus typhina laciniata. 

 G. Stem less velvety; blades 9-13; low, nearly procumbent; 

 poisonous; fruit red; southern. Dwarf Sumach — Rhus 

 pumila. 

 G. Stem slightly hairy when young ; tree-like, 20-30 feet high; 

 hardy only South ; very poisonous ; from Japan. Varnish 

 or Lacquer Tree — Rhus vernicifera. 



* Leaves deciduous, simple, rounded at tip ; fruit generally abortive 



and plume- or smoke-like, C6tinus. (I.) 

 I. 10-15 feet high. Smoke Bush (123) or Venice Sumach — Rhus 



Cotinus (Cotinus C6tinus). 

 I. 20-40 feet high. Wild Smoke-tree or Chittam Wood — Rhus 



Cotinoides (Cotinus Cotinoides). 



* Leaves evergreen, usually simple (occasionally with 3 blades), entire- 



edged ; low, 2-8 feet high ; hardy only in the extreme Sov^th ; from 

 California. (J.) 



