SPONDIACEAE 809 
red-streaked heart-wood is heavy and hard, but not strong. A p tree in 
hammocks, a shrub, often with diffuse or depressed stems in pinelan 
4. TOXICODENDRON [Tourn.] Mill  Shrubs, trees, or woody vines, 
with poisonous sap. Leaf-blades pinnately compound. Flowers polygamous or 
dioecious, in rather dense panicles, white or greenish. Sepals 4-6. Petals 4-6. 
Ovary glabrous. Styles short. Drupe mostly glabrous, the sarcocarp wax- 
secreting. Seed ribbed.—About 20 species, North American and Asiatie—Spr.— 
sum.—The sap is a powerful skin poison. Some of the species are used 
medicinally. 
Leaf-blades 3-foliolate: vines or low shrubs: panicles of fruits spreading. 
Stems climbing or erect especially when young: blades 
of n leafiets coarsely toothed or entire, thin 1. T. radicans. 
Stem ect: blades of the leaflets lobed, thickish. 2. T. Toxicodendron., 
Leaf-blades. T-11- foliolate: tall shrub or tree: panicles of 
fruits drooping. 3. T. Verniz. 
1. m radicans es Kuntze. Ste em elim Es by aérial roots: blades of the 
rows, and swamps, various provinces, 
to Miss. Nebr., Minn., and N. S.—(W 
ledflets ovate in out ae or Pd obovate, 
g, eoarsely erenate-lobe ni- 
cles densely flowered: petals lliptic-lanceo. 
late, about 2.5 mm. lo upe 
gl e. [Rhus Toxicodendron ]—(Por- 
SON-OAK.) — Dry woods and pin EE 
ie es Plain id rarely adj. Aras Fla. 
ex. 'lenn. and N. J. bu ms are 
Simple or little eae | The lea flet- peered are much firmer in texture than in 
radicans, and strongly Bcc benea 
3. T. Vernix (L.) Kuntze. Shrub or small tree: blades of the lateral leaflets 
elliptie, or oval, 4—15 cm. long, undulate: petals linear-elliptie, about 2 mm 
5 mm. broad, i oping panicles Us 
long: drupes subglobose, about ad, i l [Rhus Ver- 
nis L. us ve s pial era OOD. POISON-ELDER. 
POISON-DOGWOOD. iw SUMAC.)— alluvial swamps and wet woods, vari- 
ous provinces, Fla d Me -—The heart-wood, coarse-grained, 
; , Minn 
light and soft, is am P with, yellow. 
RHUS L. Shrubs or trees, not alana Leaf-blades pinnately com- 
pound. several-foliolate. Flowers polygamous or dioecious, borne in termina 
usually compact panicles, white or oe a ie Sepals commonly 5. Petals 
commonly 5. Ovary pubescent. Style short. Drupe pubescent. Seed smooth 
and even.—About 125 species, natives of temperate and warm regions.—Spr.— 
‘Sumacs. The bark and leaves are sometimes used for tannin ng. 
Rachis of the leaf wingless, terete or nearly so: fruiting panicles in 
. HIRTAE. 
Rachis of the leaf winged: fruiting panicles nodding. JI. LEUCANTHAE. 
