Comarostaphylis discolor subsp. rupestris (Robertson & Seaton) Diggs

Comarostaphylis rupestris (Rob. & Seaton) Small
Arctostaphylos rupestris Rob. & Seaton, Proc. Am. Acad. 28: 112. 1893.
A shrub with tomentulose twigs ; leaf-blades oblong, rather narrowly so, to oblong-oblanceolate, 7-16 cm. long, acute or shortacuminate, serrulate with cartilaginous-tipped teeth, finely pubescent above, at least when young, tomentulose beneath, short-petioled; panicles rather loosely flowered, the rachis and pedicels tomentulose; calyx 4-5 mm. wide, the lobes deltoid to reniform, acute or sometimes abruptly pointed, ciliolate; corolla 6-7 mm. long; stamens about 3 mm. long, the filaments villous-hirsute ; drupes not seen.
Type locality: Near Patzcuaro, Michoacan. Distribution: Michoacan.

Arbutus spinulosa Mart. & Gal. Bull. Acad. Brux. 9^: 532
1842.
A shrub ; branchlets puberulent or finely pubescent ; leaves bright-green, the blades oblonglanceolate or oblong, varying to oblong-ovate, or obovate, 4-7 cm. long, or rarely larger, acutish, acute, or abruptly shortacuminate, slightly reticulate and tdtimately glabrous above, more or less tomentulose beneath, serrate, with the teeth sometimes spine-tipped, abruptly narrowed or rounded at the base, relatively short-petioled, sometimes very short-petioled ; panicles mostly 2-5 cm. long, often clustered, the rachis and pedicels finely pubescent; calyx 4-5 mm. wide, the lobes triangular, acute or acuminate; corolla 6-7 mm. long; stamens 2.5-3 mm. long, the filaments villous; berries not seen.
Type locality: Michoacan. Distribution: Western Mexico.