Part 1, 1914] ERICACEAE 83 
Ovary glabrous. 
Inflorescence-branches finely pubescent or tomentulose with 
giandless hairs. 
Leaf-blades entire or nearly so, not reticulate. 2. A. arizonica, 
Leaf-blades serrate with cartilaginous teeth, somewhat 
reticulate: 7. A. laurina. 
Inflorescence-branches with glandular-hairs mixed with the non- 
glandular pubescence. 
Calyx pubescent and ciliolate; leaf-blades dull above; fila- 
ments long-villous. 8. A. Donnell-Smithii. 
Calyx glabrous or merely ciliolate; leaf-blades shining above; 
filaments short-villous. 9. A. peninsularis. 
Inflorescence-branches glandular-hirsute. 10. A. glandulosa. 
1. Arbutus Menziesii Pursh, Fl. Am. Sept. 282. 1814. 
Arbutus procera Dougi.; Lindl. Bot. Reg. 21: pl. 1753. 1836. 
A tree 30 m. tall or less, or a shrub, the bark of the trunk dark reddish-brown, the branch- 
lets bright reddish-brown; leaves dark-green, at least above, the blades oval or ovate, or some- 
times oblong, 5-12 cm. long, obtuse or acutish, glabrous, or sparingly fine-pubescent especially 
when young, abruptly narrowed, rounded, truncate or sub-cordate at the base, rather long- 
petioled; panicles 6-14 cm. long, the rachis and pedicels closely fine-pubescent or puberulent; 
calyx 5—6 mm. wide, the lobes ovate, obtuse or acutish; corolla 7-8 mm. long; stamens 3.5-4 
min. long, the filaments villous; ovary glabrous; berries globose, varying sometimes to oval or 
obovoid, 10-13 mm. long, orange-red. 
TYPE LocaLiry: Northwest coast of America. 
DistrrwBution: British Columbia to California. 
Intustrations: Lindl. Bot. Reg. 21: pl. 1753; Paxt. Fl. Mag. 2: pl. 147; Sarg. Silva pl. 231; 
Sarg. Man. f. 586; Jepson, Trees Calif. f. 115; Mem. Univ. Calif. 2: pl. 82, 83; Eastw. Handb. 
Trees Calif. #1. 53; Britton, N. Am. Trees f. 693. 
2. Arbutus arizonica (A. Gray) Sargent, Garden & Forest 4: 317. 
1891. 
Arbutus xalapensis arizonica A. Gray, Syn. Fl. N. Am. ed. 2. 2!: 396. 1886. 
A tree 20 m. tall, the bark of the trunk ashy-gray or whitish, the branchlets red, or a 
shrub; leaves pale-green, the blades narrowly oblong, oblong-lanceolate, or lanceolate, 4-9 cm. 
long, mostly acute or acuminate, entire or obscurely toothed, glabrous, at least at maturity, 
abruptly narrowed or rounded at the base, rather slender-petioled; panicles 3-7.5 cm. long, 
the rachis and pedicels somewhat sparingly fine-pubescent ; calyx 4-5 mm. wide, the lobes ovate, 
acute or acutish; corolla 6-7 mm. long; stamens about 3 mm. long, the filaments villous at 
the dilated base; ovary glabrous; berries globose or oval, 7-9 mm. long, orange-red. 
Type LocALIry: Mountains of southern Arizona. 
DrstriBpution: Arizona and Sonora to Coahuila. 
InLustrations: Gard. & Forest 4: f. 54; Sarg. Silva pl. 233; Sarg. Man. f. 588; Britton, 
N. Am. Trees f. 695. 
3. Arbutus xalapensis H. B. K. Nov. Gen. & Sp. 3: 279, 1819. 
? Arbutus densiflora H. B. K. Nov. Gen. & Sp. 3: 280. 1819. 
? Arbutus petiolaris H. B. K. Nov. Gen. & Sp. 3: 281. 1819. 
Arbutus laurifolia Lindl. Bot. Reg. 25: pl. 67. 1839. 
Arbutus rubescens Bertol. Novi Comm. Acad. Bonon. 4: 420. 1840. 
Arbutus xalapensis pubescens Benth. Pl. Hartw. 66. 1840. 
Arbutus varians Benth. Pl. Hartw. 77. 1841. 
? Arbutus floribunda Mart. & Gal. Bull. Acad. Brux. 9!: 534. 1842. 
? Arbutus macrophylla Mart. & Gal. Bull. Acad. Brux. 91: 534. 1842. 
? Arbutus paniculata Mart. & Gal. Bull. Acad. Brux. 91: 535. 1842. 
Arbutus xalapensis texana A. Gray, Syn. Fl. N. Am. ed. 2. 2': 397. 1886. 
? Arbutus xalapensis petiolaris Loesener, Bull. Herb. Boiss. II. 3: 219. 1903. 
A tree mostly 15 m. tall or less, or a shrub, the bark of the trunk dark-brown or nearly 
black, the branchlets reddish; leaves deep-green, or pale beneath, the blades ovate, oval, or 
broadly oblong, varying to oblong-lanceolate or ovate-lanceolate, 4-11 cm. long, obtuse, ab- 
