SUMAC FAMILY 51 



pedicels slender ; drupes 4-6 mm. in diameter, glabrous, with a thin deciduous epicarp and a waxy- 

 persistent mesocarp ; stone striate. 



Borders of streams, thickets and wooded slopes, Upper Sonoran and Transition Zones; western Washington 

 to northern Lower California, Sonora and Michoacan. A variable species as to shape and size of leaflets 

 and to the amount of pubescence, and a number of species have been proposed. Type locality: "Oregon " April- 

 May. 



3. Rhus radicans L. Poison Ivy. Fig. 3084. 



Rhus radicans L. Sp. PI. 266. 1753. 



Rhits Tortcodendriim L. loc. cit. in part. 1753. 



Toxicodendron hesperiunt Greene, Leaflets Bot. Obs. 1: 118. 1905. 



Shrub 0.5-1 m. high, sometimes climbing but not vine-like. Leaves 3-foliolate, deciduous, 1-3 

 dm. long, petioles as long as or longer than the leaflets ; leaflets all petiolulate, sometimes pilose, 

 ovate, acuminate, 5-15 cm. long, entire or sometimes remotely repand-dentate ; axillary racemes 

 compact, the pedicels short ; drupes 5—7 mm. in diameter. 



Dry rocky canyons and talus slopes, Upper Sonoran and Arid Transition Zones; eastern Washington and 

 Oregon east to the Atlantic seaboard and south to Mexico and the Bahama Islands. A variable species from 

 which a number of species and varieties have been segregated. Type locality: Virginia. June-Aug. 



4. Rhus trilobata Nutt. Squaw Bush or Skunk Bush. Fig. 3085. 



Rhus trilobata Nutt. ex Torr. & Gray, Fl. N. Amer. 1: 219. 1838. 



Rhus aromatica var. trilobata A. Gray, Amer. Journ. Sci. II. 33: 408. 1861. 



Schmaltsia trilobata Small, Fl. S.E.U.S. 728. 1903. 



Low branching erect shrub, rather strongly aromatic, the young branchlets pubescent. Leaves 

 3-foliolate, deciduous, more or less pubescent on both surfaces ; terminal leaflet 2.5-5 cm. long, 

 3-lobed and coarsely toothed, the lateral leaflets smaller, round-ovate, scarcely lobed, crenate; 

 flowers yellowish, appearing before the leaves in short spike-like clusters ; drupe viscid-hirsute', 

 reddish. 



Dry hillsides and plains, Upper Sonoran Zone; Oregon to northern Lower California, east to the Great 

 Plains. A variable species especially as to pubescence and size of leaf, and a number of species and varieties 

 have been proposed. It is closely related to Rhus aromatica Ait. of the eastern United States. Type locality: 

 in the Rocky Mountains. Feb.-April. 



5. Rhus integrifolia (Nutt.) Benth. & Hook. Lemonade Bush or Coast Sumac. 



Fig. 3086. 



Styphonia integrifolia Nutt. ex Torr. & Gray, Fl. N. Amer. 1:220. 1838. 

 Styphonia serrata Nutt. ex Torr. & Gray, loc. cit. 



Rhus integrifolia Benth. & Hook. f. ex Rothrock in Wheeler Rep. 84. 1878. 

 Neostyphonia integrifolia Shafer in Britton, N. Amer. Trees 612. 1908. 



Evergreen shrub, 1-3 m. high, aromatic, with short stout and rather stiff branchlets. Leaves 

 oval, rigid-coriaceous, very obtuse at both ends, entire or sometimes serrate, 2.5-4 cm. long, dark 

 green above, paler beneath ; inflorescence and young parts canescently puberulent ; flowers white 

 or rose-colored, glomerate, subtended by orbicular bracts within which are 2 thinner bractlets; 

 sepals scarious-margined, ciliate; drupes very viscid and acid, about 10 mm. in diameter, com- 

 pressed. 



Bluffs along the coast, and in its southern range, extending inland into the chaparral belt of the mountains. 

 Upper Sonoran Zone; Santa Barbara County, California, to northern Lower California. Type locality: on the 

 margins of cliffs near the sea around San Diego and Santa Barbara, California. March-May. 



6. Rhus ovata S. Wats. Sugar Bush or Chaparral Sumac, Fig. 3087. 



Rhus ovata S. Wats. Proc. Amer. Acad. 20: 358. 1885. 

 Neostyphonia ovata Abrams, Bull, N.Y. Bot. Gard. 6:403. 1910. 



Evergreen shrub, 1.5-3 m. high, with rather stout glabrous branchlets. Leaves rigid-coria- 

 ceous, smooth and shining, ovate or subcordate, acute at apex, entire or sharply serrate ; inflores- 

 cence glabrous or glabrate ; bracts suborbicular with 2 smaller bractlets within ; sepals obscurely 

 or not at all ciliate ; drupes glandular and viscid, the pulp sweetish to the taste, 8 mm. in diameter, 

 compressed. 



Chaparral belt, LTpper Sonoran Zone; Santa Barbara County, California, to northern Lower California and 

 Arizona. Type locality: not definitely stated in the original publication. March-May. 



7. Rhus laurina Nutt. Laurel Sumac. Fig. 3088. 



Rhus laurina Nutt. in Torr. & Gray, Fl. N. Amer. 1: 219. 1838. 



Lithraea laurina Wnlp. Rep. 1:551. 1842. 



Malosma laurina Nutt. ex Abrams, Fl. Los Ang. ed. 2. 220. 1917. 



Shrub or small tree, 2-4 m. high, aromatic, glabrous. Leaves oblong-lanceolate, 7-10 cm. 



long, acute or obtuse at the apex, rounded at base, mucronate, rather thin-coriaceous ; petioles 



slender, 1-3 cm. long ; flowers small, white, in ample, many-flowered, terminal panicles ; drupe 



whitish, 2-3 mm. in diameter, glabrous ; mesocarp waxy ; stone minute, smooth. 



Dry washes and mountain slopes, Upper Sonoran Zone; Santa Barbara County, California, to central Lower 

 California. Type locality: "On bushy plains, near Santa Barbara." May-Aug. 



Schinus molle L. Sp. PI. 388. 1753. Pepper Tree or Peruvian Pepper. Aromatic dioecious evergreen 

 tree, with pendulous branchlets and light brown bark. Leaves pendulous, pinnate; leaflets linear-oblong; flowers 

 small, paniculate; fruit a bright red peppery berry. Native of South America; long planted as an ornamental in 

 California, and occasionally growing spontaneously in the southern part of the state. 



