116 ) ACERACE. os oyrTise 
ACER. 
1 VITIS Tourn. Inst 613. L. Gen. n. 284. (GRAPE.) 
Woody vines, climbing by tendrils that are opposite to leaves, 
with acid juice, mostly simple opposite leaves and small greenish 
flowers in compound racemes or panicles that are opposite the 
upper leaves. Calyx very small, entire or 4-5-toothed or -lobed, 
the tube filled with a fleshy annular disk which bears the 4 or 5 
thick caducous petals and the distinct stamens. Fruit a more or 
less pulpy berry. 
V. Californica Benth. Bot. Sulp. 10. Stems often 1—2 inches in 
diameter below, climbing trees to the height of 20—30 feet: leaves 
round-cordate with a deep and narrow sinus, 2—38 inches long, nearly 
as broad, obtuse, rather coarsely serrate and often somewhat 3-lobed, 
tomentose or canescent, especially beneath: fruit 4 lines in diameter, 
in rather large clusters, purple, covered with bloom: seeds broad. 
Along streams, from the Umpqua Valley, Oregon, to southern Califor- 
nia. 
Orper XXIV ACERACEAE J. St. Hil. Expos. Fam. ii, 15. 
Trees or shrubs with opposite palmately lobed or pinnately 
3—5-foliolate (rarely alternate and entive) leaves without stip- 
ules and small flowers in lateral or terminal racemes or fascei- 
cles that are often by a bortion polygamous or dicecious. Sepals 
6, rarely 4-9, more or less united, imbricate in the bud. Pet- 
als as many as sepals and alternate with them, inserted around 
a commonly lobed hypogynous disk, sometimes wanting. Sta- 
mens usually 8, sometimes 3-12, distinct inserted on the disk: 
anthers introrse or versatile. Ovary 2-lobed, composed of 2 
united carpels each containing 2 collateral ovules, or a single 
20 vuled carpel. Styles more or less combined, stigmatose on 
the inside or the stigma almost sessile. Fruit composed of 2, 
rarely 3 or 4, indehiscent samarioid carpels, finally separable 
from the filiform axis the wing thickened at the lower margin, 
or a cartilaginous follicle. Seeds 1 or 2 in each cell, erect, 
with little or no albumen. Embryo curved or nearly straight, 
with foliaceous cotyledons variously folded upon each other. 
1 Acer. Leaves opposite, palmately lobed or rarely divided: flowers in 
racemes or fascicles, polygamous. 
2 Forsellesia. Leaves alternate, simple and entire: flowers solitary ter- 
minating short axillary branches cr spur-like fascicles, perfect. 
1 ACER Tourn. Inst. 615, L. Gen. 1155. (MAPLE.) 
Trees or shrubs with opposite mostly palmately lobed leaves 
and small flowers in terminal racemes, umbel-like corymbs or 
fascicles. Calyx colored, usually 5-lobed. Petals 5, sometimes 
wanting. Stamens 3-12, usually 8, inserted with the petals up- 
on a lobed hypogynous disk. Styles 2, elongated. Ovary 2- 
lobed, rarely 3-or 4-lobed, and as many celled, with a pair of 
ovules in each cell, becoming in fruit a double, rarely triple or 
quadruple, samara thatis separable at maturity into 1-seeded 
indehiscent winged nutlets. 
