CYRILLA FAMILY. 601 
ber. Drupes white. Tall shrub 10 to 18 feet high; frequently arborescent. Most 
abundant in the pine-barren swamps of the Coast Pine belt. Leaves extremely poi- 
sonous to the touch. 
Type locality: ‘Hab. in America septentrionali, Japonia,” 
Herb. Geol. Surv. Herb. Mohr. 
Rhus radicans L. Sp. Pl. 1: 266, 1753. Poison Ivy. Porson VINE. 
Rhus toricodendron radicans Torr, Fl, U.S. 324, 1824. 
Lt. toricodendron var, vulgare Michx. Fl. Bor, Am. 1: 183, 1803. 
Ell. Sk. 1:363. Gray, Man. ed. 6, 119, in part. Chap. FI. 69. 
SAKHALIN, JAPAN, KURILE ISLANDS, MEXICO. 
Alleghenian to Louisianian area. Nova Scotia, Ontario; New England west to 
Dakota and Arizona, south to the Gulf from Florida to western Louisiana and 
Arkansas. 
ALABAMA: Throughout. In rich damp woods. Bottom lands. Flowers white, 
May; fruit ripe in August and September. A stout root climber, ascending the 
highest trees; lateral branches 3 to 4 fect long. Also creeping on the ground and 
over rocks. Leaves soft, entire, more or less toothed and incised. Like the last, 
poisonous to the touch. 
Economie uses: The fresh leaves are used medicinally, being the ‘Rhus toxico- 
dendron” of the United States Pharmacopwia, 
Type locality: “Hab. in Virginia, Canada,” 
Herb. Geol. Surv. Herb. Mohr. 
Rhus toxicodendron L. Sp. Pl. 1: 266. 1753. POISON OAK, 
Rhus toricodendron var. quercifolium Michx. Fl. Bor, Am, 1: 183. 1803. 
Ell, Sk. 1:363. Gray, Man. ed. 6, 119, in part. Chap. Fl. 69. Coulter, Contr. 
Nat. Herb. 2: 68, in part. 
Carolinian and Louisianian areas. New Jersey to Florida and Texas. 
ALABAMA: Throughout, but much less frequent, In dry sterile soil, barren hill- 
sides and pine barrens. Flowers greenish white; April. Fruit ripe in August and 
September. Drupes white. Low shrub, 1 to scarcely 2 feet high, with an erect, 
slender stem from a creeping slender root, never climbing, leaves thick, obtusely tri- 
lobed. Most frequent in the sandy pine ridges of the Coast Pine belt. Forms inter- 
grading with the last have not been met with. Leaves equally deleterious. 
Type locality: ‘ Hab. in Virginia, Canada.” 
Herb. Geol. Surv. Herb. Mohr. 
Rhus aromatica Ait. Hort, Kew. 1: 367. 1759. FRAGRANT SUMACH. 
Rhus canadensis Marsh. Arb, Am, 129. 1785, Not Nutt. 
Ell. Sk. 1:364. Gray, Man. ed. 6, 119. Chap. FL 69. Coulter, Contr. Nat. Herb. 
2:68. 
Alleghenian to Louisianian area. Ontario and New England; Vermont west to 
Michigan, south to West Virginia; Ohio Valley to Missouri, southern Kansas, Arkan- 
sas, and Texas, and from Tennessee to Georgia and western Florida. 
ALABAMA: Tennessee Valley. Mountain region to the Upper division of Coast Pine 
belt. Clay County, Che-aw-ha Mountain, 2,400 feet. Madison County, flanks of 
Montesano, 600 to x00 feet. Jackson County, Gurley’s, 800 feet. Dekalb County, 
Lookout Mountain, 800 feet. Blount County, Warnock Mountain, 800 feet. Dale 
County, Ozark, scarcely over 250 teet above the sea. Flowers yellowish, March, 
April. Fruit ripe in June; drupes scarlet, aromatic, A slender shrub, 8 to 12 feet 
high, with wandlike branches. Most frequent on the calcareous slopes of the Ten- 
nessee Valley. 
Type locality: “Native of Carolina, Mr. John Bartram.” 
Herb. Geol, Surv. 
CYRILLACEAE. Cyrilla Family. 
CYRILLA L. Mant. 1:50. 1767. 
One species, southeastern North America. 
Cyrilla racemiflora L. Mant. 1:50. 1767. LEATHERWOOD, BLACK TI-TI. 
Ell. Sk. 1:294. Chap. Fl. 272. Sargent, Silv. N, A. 2: 3, t. 51. 
Louisianian area. Western Florida along the coast to North Carolina and west to 
eastern Louisiana. 
ALABAMA: Central Pine belt to Coast plain, Sandy swamps, borders of pine- barren 
streams. Autauga County (/. A. Smith). Lee County, Auburn (Baker §° Earle). 
