38 NORTH AMERICAN FLORA [VorumE 29 
4. Ledum glandulosum Nutt. Trans. Am. Phil. Soc. Il. 8: 270. 1843. 
?Ledum californicum Kellogg, Proc. Calif. Acad. 2:14, 1863. 
An erect shrub with puberulent twigs; leaf-blades oblong, elliptic, or oval, varying to ovate 
or obovate, 1.5-5 cm. long, not revolute, pale and resinous-glanduliferous beneath, minutely 
rugose above in age, longer-petioled than those of any of the preceding species; flower-clusters 
terminal and also lateral, with concave finely pubescent bracts; pedicels slender, minutely 
pubescent; calyx-lobes ovate to oblong, obtuse; petals suborbicular, ovate, or oblong, 5-8 mm. 
long; stamens 10; filaments pubescent near the base; capsules subglobose, 4-5 mm. in diameter. 
‘TYPE Locality: Rocky mountains. 
Distrisution: Alberta and British Columbia to Wyoming and California. 
ILLUSTRATION: Bot. Mag. pl. 7610. 
5. Ledum columbianum Piper, Contr. U. S. Nat. Herb. 11: 441. 
1906. 
An erect shrub with puberiilent and sometimes slightly pubescent twigs; leaf-blades 
oblong, elliptic, or oblong-ovate, 4-6 cm. long, revolute, white or whitish and resinous-granu- 
liferous beneath, finely reticulate, relatively long-petioled; flower-clusters terminal, with 
somewhat crescent-shaped, usually glabrous, bracts! pedicels slender, closely puberulent; 
calyx-lobes broadly ovate or orbicular-ovate, obtuse; petals white, oval, 5-7 mm. long; stamens 
5-7, or rarely more; filaments pubescent below the middle; capsules oblong, 5-6 mm. long. 
‘TYPE LocaLiry: Ilwaco, Washington. 
DISTRIBUTION: Washington and Oregon. 
3. "DENDRIUM Desv. Jour. Bot. Desv. II. 1: 36. 1813. 
Leiophyllum Bers, Syn. Pla 1205. | Not Leiophyllum Ehrh. 1780. 
“Ammyrsine Pursh, ET. ~oept. 301. 1814. . 
Fischeria Sw. Mém. Soc, Nat. Mose. 5:14. 1817. “Fos - . 
Shrubs with low or depressed often matted branches. Leaves alternate or opposite, 
approximate or crowded, persistent; blades broad, leathery, entire, shining above, manifestly 
short-petioled. Flowers in terminal umbel-like corymbs, erect, slender-pedicelled. Calyx 
persistent; lobes 5, narrow, much longer than the flattish base. Corolla rotate, white or pink; 
petals broad or relatively so, spreading, equal or nearly so, sessile. Stamens 10 or rarely 8, 
conspicuously exserted, as long as the petals or longer; filaments filiform, not declined, gla- 
brous; anthers globular-didymous, opening lengthwise, colored, mostly brown or purple. 
Ovary 2- or 3-celled, or rarely 5-celled, seated on a disk, very short; style straight, slender, 
columnar or clavate; stigma minute. Capsule of an ovoid type, seated in the partly clasping 
calyx, 2- or 3-valved from the apex or rarely 5-valved. 
Type species, Ledum buxifolium Berg. 
Style slender, fully twice or thrice as long as the ovary in anthesis; disk minute; ae 
petals oblong to ovate-oblong; pedicels glabrous, : 1. D, buxifolium. - 
Style stout, less than twice as long as the ovary; disk prominent; petals ovate to 
rhombic-ovate or oval; pedicels pubescent. ; 
Leaves mostly opposite; capsule-valves sharp-tuberculate; depressed or diffuse 
shrub. : 2 
Leaves alternate; capsule-valves muricate or scabrous; erect shrub. 3. 
1. Dendrium buxifolium (Berg.) Desv. Jour. Bot. 
Desv. IT. 1: 36. 1813. 
Ledum buxifolium Berg. Acta Acad. Petrop. 11: 213. 1778. 
Ammyrsine buxifolia Pursh, Fl. Am. Sept. 301. 1814. 
Fischeria buxifolia Sw. Mém. Soc. Nat. Mose. 5:14. 1817. 
Leiophyllum buxifolium Ell. Bot. S. C. & Ga. 1: 483, 1817. 
Ledum thymifolium Lam. Encye. 3: 459. 1791. 
Leiophyllum thymifolium G. Don, Gen. Hist. 3: 851. 1834. 
Leiophyllum serpyllifolium DC. Prodr. 7: 730. 1839. 
An erect much-branched shrub resembling dwarf-box, 5 dm. tall or less, glabrous through- 
out; leaves mainly alternate, the blades oblong or slightly broadened upward, 3-8 mm. long 
or rarely longer, deep-green and shining above, paler and dull beneath, short-petioled; pedicels 
glabrous; calyx-lobes oblong-lanceolate to lanceolate, about 1 mm. long, obtusish or acutish 
