acer. ACERACE/E. ±17 



FORSELLESIA. 



* Flowers iu racemes: body of the fruit hispid. 



A. luacrophyllum Pursh PI. 2(>7. (Large leaved Maplf ). 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 

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

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

 Columbia to California and Idaho. 



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

 smooth. 



A. glabrum Terr. Ann. Lye. N. Y. ii. 172. (Smooth Maple.). A shrub 

 or small tree 0—30 feet high. 2—8 inches in diameter, glabrous through- 

 out except the bud scales which are densely villous inside: leaves 

 round-cordate with shallow sinus. 2 — 1 inches broad, nearly as long, 

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

 serrate with acuminate teeth, conspicuously veined and reticulated': 

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

 branchlets, 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. Vancouver Island to California and the Rocky Mountains. 



A. circinatum Pursh Fl. 26(5. ( Vine Maple*). A large shrub 10—30 

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

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

 lobed nearly co the middle, the acute lobes doubly 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 the sepals, 

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

 fruit 10—10 lines long, the wings spreading at right angles to the pedi- 

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

 Cascade Mountains. 



2 FORSELLESIA Greene Eryth. 1. 200. 



GLOSSOPETALON Gray PI. Wright, ii, 29, t. 12. not Schreber. 



Low and rigid shrubs with slender spineseent branches, and 

 small alternate simple entire leaevs, which separate in age by an 

 indistinct articulation from a dilated scale-like minutely 2-stip- 

 ulate base ; the setaceous- subulate stipules adnate to the scales, 

 and small solitary flowers, terminating short axillary branchlets, 

 or spur-like fascicles. Calyx deeply 4 — 5-cleft, persistent, its Hat 

 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 snture barelv above the base of the 



