RHUS 



RHUS 



ones having appeared in the trade, so far as the writer 

 knows. 



In the following enumeration, two species of Cotinus 

 (Nos. 3 and 4) are included. 



arnniatica, 5. 

 atropurpurea, 3. 

 Caii.idensis, 5. 

 copullina, 15. 

 Coriaria, 14. 

 cotinoides, 4. 

 Cotinus, 3. 

 diversiloba, 7 



INDEX. 

 glabra, 8. 

 integrit'oliji, 1. 

 laciniata, 8, 11. 

 Osbeckii, 16. 

 ovata, 2. 

 pumila, 12. 

 radicans, 6. 

 semialata, 16. 



succedanea, 10. 

 Toxicodeiidron, 

 trilobata, 5. 

 typhina, 11. 

 venenata, 9. 

 vernicifera, 13. 

 Vernix, 9. 



A. Foliage simple. 



B. Peduncles not plumose in fruit. 1. integrrifolia 



2. ovata 



BB. Peduncles plumose in fruit 3. Cotinus 



4. cotinoides 

 AA. foliage compound. 



B. Lft.s. normally 3 5. Canadensis 



6. diversiloba 



7. Toxicodendron 



BB. Lftx. 



c. Lvs. smooth on both sides. 



8. glabra 



9. venenata 

 10. succedanea 



cc. IA-S. pubescent beneath 11. typhina 



12. pumila 



13. vernicifera 

 D. Eachis margined 14. Coriaria 



DD. Kacnis winged between 



Ifts 15. copallina 



16. semialata 



1. integrifdlia, Benth. & Hook. Shrub, 2-8 ft. high: 

 Ivs. oval, entire, or occasionally long-petioled, with 3 

 Ifts.: panicles and new growths puberulent: fls. white 

 or rose-colored : fr. very large. California. S.S. 3:109. 

 An evergreen species. 



2115. Rhus glabra (X %). 



2. ovata, Watson. Another Californian species re- 

 sembling the last, but with larger and smoother leaves. 



3. Cotinus, Linn. SMOKE BUSH. VENICE SUMACH. A 

 bush 10-12 ft. high, with simple obovate Ivs. and brown 



bark: fls. purple, in ample loose panicles and on very 

 long pedicels, which become profusely pluuioM-. giving 

 the plant the smoky appearance from which it derives 

 its common name. Early summer. Eu., Asia. Var. 

 atropurpurea, Hort., is distinguished by the darker 



2116. Young plants of Rhus typhina. var. laciniata. 



color of its inflorescence. This species used to be com- 

 mon in cultivation, but it does not seem to reproduce 

 itself as readily as some species, and in many cases 

 when killed by borers or other causes, it has not been 

 replaced. Gng. 5:118. Gn. 34, p. 162; 54, p. 505. 



4. cotinoides, Nutt. A small tree, 20-40 ft. high : Ivs. 

 undivided, oval or obovate, smooth, thin: Us. greenish 

 yellow, in large panicles : pedicels becoming plumose as 

 they develop. Flowers in spring, and the foliage as- 

 sumes most brilliant autumn tints. Mississippi valley. 

 S.S. 3:98-9. Known also as Cotinus Americanus, Nutt. 

 Sometimes called "Chittam-wood." 



5. Canadensis, Marsh. (It. aromdtica, Ait. ). Spread- 

 ing shrub, 3-8 ft. high, with 3-foliate, crenate, pu- 

 bescent, petiolate, aromatic Ivs. : fls. yellow, small, in 

 clusters or short spikes, either axillary or sometimes 

 terminal: fr. globular, coral-red, sparsely hairy, and 

 comparatively large. Flowers in spring before the Ivs. 

 appear. Rocky woods, eastern N. Amer. Var. trilobata 

 has the Ifts. deeply cut or 3-lobed. This is one of our 

 best cover plants or under-shrubs and spreads naturally 

 by layers. Will flourish in any soil and is especially 

 adapted to dry, rocky banks. 



6. Toxicodendron, Linn. POISON OAK. POISON IVY 

 A scandent or climbing plant: Ivs. smooth or often 

 pubescent on veins, ovate, sinuate, or lobed, petiolate 

 panicles short-stalked: fr. ribbed when dry. June. N 

 Amer. V. 10:103. Care should be taken in planting 

 this species, as it is very poisonous to many, and for 

 this reason it should be extirpated from our ornamental 

 plantations, rather than added to them. The autumn 

 color is attractive. As here understood, it includes J?. 

 radicans, Linn. 



7. diversiloba, Torr. & Gray. A Californian species 

 closely allied to the preceding, equally poisonous, and 

 therefore not to be recommended for planting. 



8. glabra, Linn. SMOOTH SUMACH. Fig. 2115. Smooth, 

 glaucous. 10-15 ft. high: Ifts. many, green above, white 

 beneath, narrowly oblong, with serrated edges: fls. in 

 terminal panicles: fr. crimson, hairy. July. N.Amer. 

 One of the best species for mass or other planting. Var. 

 laciniata, Carr., has the Ifts. deeply cut, giving the Ivs. 

 a very fern-like appearance. Like the type, it colors in 

 autumn. R.H. 1863, p. 7. V. 10:101. 



9. venenata, DC. DOGWOOD. POISON SUMACH. Usu- 

 ally taking the form of a tree, 10-20 ft. high : Ifts. 7-13 

 on a red petiole and midrib, smooth, shining green 

 above, pale beneath: fls. in a narrow panicle, drooping: 

 fr. small, flattened, white. June. Moist ground, eastern 

 N. Amer. One of the most beautiful, but unfortunately 



