Parr 1, 1914] ERICACEAE 45 
less tomentulose beneath, short-petioled; pedicels glaucous, sometimes finely pubescent; 
calyx-lobes blunt, finely glandular; corolla rose-purple or white, 1.5-2 cm. long, the lobes 
of both lips narrow, obtuse; stamens 10; style often somewhat exserted ; capsules oblong or 
slightly narrowed upward, 9-16 mm. long, glaucous, glandular-pubescent. 
TYPE LocaLiry: Canada. 
Disrrisution: Newfoundland and Nova Scotia to Quebec, New Jersey, and Pennsylvania. 
InLustRations: L’Her. Stirp. Nov. pl. 68; Bot. Mag. pl. 474; Nouv. Duham. 3: pl. 53; Lam. 
Tab. Encyce. pl. 364; Britt. & Brown, Ill. Fl. f. 2748; ed. 2. f. 3220. 
9. THERORHODION (Maxim.) Small, gen. nov. 
Rhododendron §Therorhodion Maxim. Mém. Acad. St.-Pétersb. VII. 169: 47. 1870. 
Shrubs with depressed stems, the bud-scales thin, persistent. Leaves alternate, often 
approximate at the ends of branches; blades broad, thinnish, but somewhat chartaceous, usually 
obscurely toothed, veiny, sessile or nearly so. Flowers perfect, solitary or two together, 
terminating leafy shoots. Calyx rotate; lobes 5, foliaceous, persistent. Corolla’ bright- 
colored, rotate, deeply lobed, divided to the base on the lower side; lobes 5, broad, spreading, 
somewhat unequal. Stamens 10, declined, shorter than the corolla; filaments unequal; 
anthers oval or obovoid. Ovary mostly 5-celled, slightly lobed, depressed; style elongate, 
curved, slightly enlarged at the apex; stigma shallowly lobed. Capsule thin-walled. 
Type species, Rhododendron camtschaticum Pall. 
Corolla pubescent without, the lobes obovate to broadly oblong, about two- 
thirds as long as the tube; leaf-blades neither glandular-ciliate nor glan- 
dular-pubescent beneath. 1. T. camtschaticum. 
Corolla glabrous, the lobes narrowly oblong, very much longer than the short 
tube; leaf-blades glandular-ciliate and glandular-pubescent beneath. 2. T. glandulosum. 
1. Therorhodion camtschaticum (Pali.) Small. 
Rhododendron camtschaticum Pall. Fl. Ross. 1:48. 1784. 
Rhodothamnus camtschaticus Lindl.; Paxt. Fl. Gard. 1: pl. 22. 1853. 
A low or depressed shrub, mostly less than 2 dm. tall, usually much branched; leaf-blades 
cuneate to obovate, or oval on the upper part of the plant, 1-4 cm. long, obtuse or rounded at 
the apex, except the glandular tip, obscurely crenate, bristly ciliate, veiny at maturity, shining, 
sessile or nearly so; calyx-lobes oblong to cuneate, mostly 9-21 mm. long in anthesis, glandular- 
pubescent and bristly-ciliate; corolla rose-purple, 2—2.5 cm. long, pubescent, the lobes erose and 
often ciliolate; capsules ovoid, 8-10 mm. long. 
Type LocaLity: Shores of the Sea of Okhotsk, Kamtchatka. 
DistriBuTion: Alaska, through the Aleutian Islands to Japan. 
ILLUSTRATIONS: Pall. Fl. Ross. pl. 33; Paxt. Fl. Gard. 1: pl. 22. 
2. Therorhodion glandulosum Standley, sp. nov. 
A low shrub forming dense clumps about 1 dm. tall, usually copiously branched; leaf- 
blades spatulate, often broadly so, or oval or ovate, on the upper part of the branches, 1-2 cm. 
long or jess, obtuse, often rounded and abruptly pointed, or sometimes acute at the apex, 
crenulate, glandular-ciliate, veiny, somewhat shining, sessile or nearly so; calyx-lobes oblong, 
often narrowly so, to elliptic-oblong, 8-10 mm. long in anthesis, glandular-pubescent and 
glandular-ciliate; corolla rose-purple, 2 cm. long or slightly shorter, glabrous, the lobes some- 
what erose, eciliolate; capsules oval, 7-9 mm. long, pubescent with short white hairs. 
Type collected at the foot of Kigluaik Mountains, near Oogluk Bay, Imuruk Basin, in the vicinity 
of Port Clarence, Alaska, August 4, 1901, F. A. Walpole 1725 (U. S. Nat. Herb.). 
DISTRIBUTION: Imuruk Basin, Alaska. 
10. AZALEASTRUM Rydb. Mem. N. Y. Bot. Gard. 1: 297. 1900. 
Shrubs with much-branched stems, the branches erect or ascending. Leaves alternate, 
deciduous, clustered or approximate on young shoots; blades membranous, rather broad, un- 
dulate or repand.. Flowers solitary or few together in axillary or lateral clusters, the thinnish 
bud-scales caducous. Calyx rotate; lobes 5, foliaceous, membranous, persistent. Corolla 
white or pale, rotate-campanulate or nearly rotate, not 2-lipped; lobes 5, broad, slightly un- 
