ANACARDIACE.'E. (CASHEW FAMILY.; 4'.' 



1. ACER, Tourii. Mai'le. 



Calyx colored, usually 5-lol)ecl. Petals as many or none. Stamens 3 to 12, 

 usually 8, inserted with the petals upon a lohcd disk. Fruit divarirately 

 2-win«;ed above, separable at maturity, each 1 -seeded. — Flowers in umbel- 

 like corymbs or fascicles. 



1 . A. grandident;ltum, Xutt. I^aas cordntv or tntuailf at fntse, rather 

 d(*eply 3 lobcd, with broad round sinuses; lobes rather acute, ronrsely sinuate- 

 dentate: tiie umbel-like corymb ncarhj srssilr, few-Howered, tlie pedireU long 

 and nodding. — Utah and northward along the western sloj)es of the moun- 

 tains. IJarely attains a foot in diameter and 30 to 40 feet in height. 



2. A. glabrum, Torr. Shmh 6 to \Q Jht hlijh: hares suhrenifuriii, orbicu- 

 lar in oiii/iiir, :i-\o\)od or more usually .3-parted ; .segments sht)rt and broad, 

 acutely incised and toothed, somewhat 3-lohed, middle one cuneatr : the umbel- 

 like corymb pedunculate: sepals about 8. — Includes A. tripartitum, Nult. 

 From New Mexico to Wyoming and westward. Along water-courses among 

 the mountains. 



2. NEGUNDO, Manch. Kox-Eldeu. 



Petals and disk none. Fruit as in Acer. — Sterile tlinvers on clustered 

 capillary pedicels, the fertile in drooping racemes. 



1. N. aceroides, Ma'nch. Leatiets very veiny, ovate, pointed, tootljed : 

 fruit smooth, with large rather incurved wings. — In the valleys from New 

 Mexico northward. A tree with light green twigs and delicate drooping 

 clusters of greenish flowers a little earlier than the leaves. 



Order 24. ANACARDIACE.i:. (Cashew Family.) 



Shrub.s or trees with a resinous juice, alteru;ite leaves without .stiiuiles, 

 aud small regular flowers couiuionly jxdygamous or dia'cious. Stamens 

 as many or twice as many as the petals. The free ovary 1 -celled and 

 l-ovuled, hut the styles often 3. Fruit a dry drupe. 



1. RHUS, L. SiMACH. 



Sepals and petals usually 5. Stamens inserted under the edge of a tiisk 

 lining the base of the calyx. — Leaves simple or pinnate. 



# Leaflets 11 /o 31 : flowers in a terminal thi/rsoid panicle. 



1. R glabra, L. Shrub 2 to 12 feet high: leaflets whitened beneath. 

 lanceolate-oblong, pointed, serrate : fruit glol)ular, clothed with acid crimson 

 hairs; the stone smooth. — Colorado, Utah, Idaho, and eastward across the 

 continent. Not poisonous. 



* « Leaflets 3. 



2. R. Toxicodendron, E. C//»i/'/H7/v/roo^/<7.s' over rocks or a.-jcendinp 

 trees: leaflets rliombic-ovate, rather downy beneath, variously notched, sinu- 

 ate, or cut-lobed : flowers in loose and slander arillari/ panirhs : fruit qlohuhir, 

 glabrous, whitish or dun-colored ; tlie stone striate. — ColoraiK), Utah, Wy^v 

 ming, and eastward. Poisonous to the touch. 



