Var. Californicum, Torr. and Gray (the under drawing in the figure), has leaflets more deeply cut, thicker, and quite hairy; it is occasionally cultivated.
Order XVI. ANACARDIÁCEÆ.
(Cashew Family.)
Trees and shrubs, mainly of the tropical regions, here represented by only one genus:
Genus 27. RHÚS.
Low trees or shrubs with acrid, often poisonous, usually milky juice, and dotless, alternate, usually pinnately compound leaves. Flowers greenish-white or yellowish, in large terminal panicles. Fruit small (1/8 in.), indehiscent, dry drupes in large clusters, generally remaining on through the autumn.
| * Leaves simple, rounded, entire | 6, 7. | |||
| * Leaves once-pinnate. (A.) | ||||
| A. Twigs very hairy; rachis not winged; leaflets 11 to 31 | 1. | |||
| A. Twigs downy; rachis wing-margined; leaflets entire or nearly so | 3. | |||
| A. Twigs smooth. (B.) | ||||
| B. Rachis of leaf broadly winged; leaflets serrate | 5. | |||
| B. Rachis not winged. (C.) | ||||
| C. Leaflets 11 to 31, serrate; fruit hairy | 2. | |||
| C. Leaflets 7 to 13, entire; fruit smooth; poisonous | 4. | |||
| * Leaves twice-pinnate; variety under | 2. | |||
R. týphina.