ACER. ACEEACE.E. il7 



FORBELLESIA. 



*- Flowers in racemes: body of the fruit hispid. 



A. luacrophyllum Pvirsh Fl. 2()7. (Large leaved Maple ). A tree 

 50—90 feet high, 1—3 feet in diameter: leaves 0—12 inches long, nearly 

 as broad, cordate with a deep sinus, deeply 3— 5-cleft, the segments 

 cleft into 3—5 sinuate, acute lobes, pubescent beneath when young: 

 flowers yellow, fragrant, in crowded pendent racemes 3—6 inches long, 

 appearing after the leaves: calyx petaloid, campanulate, the broad 

 obovate segments 2—3 lines long: petals obovate, about equalling the 

 sepals: stamens 8 — 12 exserted, filaments hirsute at base style longer 

 tlian the stamens, deeply 2-lobed: fruit densely hispid, tlie glabrous 

 wing 1%— 2 inches long. In mountain ravines and river bottoms, Brit. 

 Columbia to California and Idabo. 



" * Flowers in loose umbel-like corymbs or fascicles: fruit 

 smooth. 



A. glabrum Torr. Ann. Lye. N. Y. ii. 172. (-t-'jiOoTH Maple.). A shrub 

 or small tree 6—30 feet hjgh, 2—8 inches in diameter, glabrous through- 

 out except the bud sdales which are densely villous inside: leaves * 

 round-cordate witla shallow sinus, 2 — 4 inches broad, nearly as long, 

 more or less deeply 3-lobed or parted, the ovate acuminate lobes doubly 

 serrate with acuminate teeth, conspicuously veined and reticulated: 

 flowers few, greenish-yellow, somewhat corymbose, on short 2-leaved 

 branchletSj appearing after the leaves: calyx campanulate, deeply 5- 

 cleft, the spatulate segments about 2 lines long: stamens 8, shorter 

 than the spatulate petals: fruit very smooth, with slightly spreading 

 wings, about an inch long. Along streams and on the highest moun- 

 tains, Vancouvei- Island to California and the Rocliy Mountains. 



A. circinatum Pursh Fl. 266. ( Vine MapleJ)- A large shrub 10—30 

 feet high, usually declined and somewhat viny: leaves round-cordate 

 witli a narrow shallow sinus, 3 — 5 inches long nearly as broad, 7—9 

 lobed nearly lo the middle, the acute lobes dout)ly and sharply serrate, 

 villous beneath and on the veins above when young, becoming glab- 

 rate: flowers in loose 10— 20-flowered terminal corymbs;, calyx dark 

 red, deeply 5-lobed or parted, the ovate acute sepals 2—3 lines long, 

 spreading: petals greenish white, about half as long as tiie sepals, 

 ovate, acute, erect: stamens 8, exserted: style short; ovary villous: 

 fruit 10—16 lines long, the wings spreading at riglit angles to'the pedi- 

 cels. In forests and along sreams, Alaska to California, west of the 

 Cascade Mountains. 



2 FORSELLBSIA Greene Ei-yth. 1, 206. 



GL08S0PETAL0N Gray Fl. Wright, ii, S9, t. 12. not Schreber. 



Low and rigid shrubs with slender spniesoent branches, and 

 small alternate simple e);itire leaevs, which separate in age by an 

 indistinct articulation from a 'lilated scale-like minutely 2-stip- 

 ulate base ; the setaceous-subulate stipules adnata to tiie scales, 

 and small solitary flowers, terminating short axillary branchlets, 

 or spur-like fascicles. "Calyx deeply 4 — 6-cleft, persistent, its flat 

 base within filled by an 8-10-lobed perigynous disk ; petals 4 or 

 5, inserted on the margin or under the edge of the disk, some- 

 what withering-persistent. Stamens 8 or 10 inserted at the sin- 

 uses of the disk, shorter than the calyx ; filaments subulate, 

 persistent : anthers didymous. Ovary 1-celled, of a single ovoid 

 carpel, with style extremely short or none, and a depressed en- 

 tire or obscurely 2-lobed stigma. Ovules 2, collateral or nearly 

 so inserted on the ventral suture barely above the bnse of the 



