66 NORTH AMERICAN FLORA 
Calyx-lobes usually 5; stamens usually 10. 
Filaments scarcely dilated at the base; calyx-lobes 
ovate to reniform-ovate. 
Filaments much dilated at the base; calyx-lobes lanceo- 
[VoLUME 29 
13. X. fasciculata. 
late to triangular. 14. X. affinis. 
Leaf-blades broad, of a suborbicular, oval, or obovate type. 
Leaf-blades small, prevailingly less than 3 cm. long, 
smooth or obscurely reticulate or rugose. 15. X. obtusa. 
Leaf-blades larger, prevailingly more than 4 cm. long, 
decidedly reticulate or rugose. 
Calyx-lobes orbicular-ovate to broadly ovate; corolla 
4,5-5.5 mm. long. 16. X. latifolia. 
Calyx-lobes deltoid to triangular-lanceolate; corolla 
6-8 mm. long. 17. X. macrophylla, 
Leaf-blades toothed. 
Leaf-blades pale or glaucous beneath. 
Pedicels and calyx with scant pale scurf; calyx about 4 mm. 
wide in anthesis. 18. X. truncata. 
Pedicels and calyx with close brown scurf; calyx about 3 mm. 
wide in anthesis. 19, X. tinensis. 
Leaf-blades neither pale nor glaucous beneath. 
Corolla narrow, cylindric or ovoid-cylindric, not inflated. 
Leaf-blades very thick, more or less reticulate. 
Upper and lower surfaces of the leaf-blades nearly similar. 20. X. Eggersii. 
Upper and lower surfaces of the leaf-blades very different. 
Corolla about 5 mm. long; leaf-blades thickish, ob- 
scurely reticulate in age. 21. X. Stahl. 
Corolla 6-7 mm. long; leaf-blades very thick rather 
- prominently reticulate. 22, X. Tuerckheimit 
Leaf-blades thinnish, with prominent lateral veins. 23. X. costata. 
Corolla wide, ovoid-urceolate, inflated. 24, X. Brittonii. 
1. Xolisma ferruginea (Walt.) A. Heller, Cat. N. Am. Pl. 6. 1898. 
Andromeda ferruginea Walt. Fl. Car. 138. 1788. 
Andromeda ferruginea arborescens Michx. Fl. Bor. Am. 1: 252. 1803. 
Andromeda rigida Pursh, Fl. Am. Sept. 292, 1814. 
Lyonia rigida Nutt. Gen. 1: 266. 1818. 
Lyonia ferruginea G. Don, Gen. Hist. 3: 830. 1834. Not L. ferruginea Nutt. 1818. 
Lyonia rhomboidalis G. Don, Gen. Hist. 3: 831. 1834. 
A widely branching shrub or a small tree, with reddish-scurfy twigs; leaves not much 
reduced toward the ends of the branchlets, the blades elliptic, oval, obovate, or oblanceolate, 
2.5-7 cm. long, acute, short-acuminate, or mucronate, glabrous above, red-sctirfy beneath, 
short-petioled; panicles short, often cluster-like, more or less leafy-bracted; calyx 3.5~-4 mm. 
wide, the lobes deltoid-ovate, abruptly pointed; corolla 2.5—-3 mm. long; filaments puberulent; 
anthers nearly 1.5 mm. long; capsules oblong-ovoid to oval, 4-6 mm. long. 
Type Locatity: Carolina. 
DistrRiBuTion: South Carolina to Florida, 
ILLUSTRATION: Vent. Jard. Malm. pl. 80. 
2. Xolisma fruticosa (Michx.) Nash, Bull. Torrey Club 22: 153. 
Andromeda ferruginea fruticosa Michx, Fl. Bor. Am. 1: 252. 1803. 
Andromeda ferruginea Pursh, Fl. Am. Sept. 292. 1814. Not A. ferruginea Walt. 1788. 
Lyonia ferruginea Nutt. Gen. 1: 266. 8. 
An erect shrub 2 m. tall or less, with pale-scurfy twigs; leaves much reduced in size at the 
ends of the branchlets, the blades oval or obovate to oblanceolate, mostly 1-5 cm. long, acute 
or abruptly acuminate at both ends, or sometimes obtuse, prominently reticulate, bright- 
green or shining above, pale or glaucous beneath, short-petioled; panicles cluster-like, often 
approximate on the elongate branchlets; calyx mostly 3-4 mm. wide, sometimes wider in age, 
the lobes deltoid-ovate or nearly reniform, often wider than long; corolla 3-4 mm. long; fila- 
ments pubescent; anthers fully 1 mm. long; capsules ovoid, 4-6 mm. long. 
1895. 
Type LocaLity: Florida. 
DistrRiBution: South Carolina to Florida. a 
ILLUSTRATION: Bot. Cab. pl. 430 (as Andromeda rigida). 
3. Xolisma squamulosa (Mart. & Gal.) Small. 
Lyonia squamulosa Mart. & Gal. Bull. Acad. Brux. 91: 542. 1842. 
A widely branching shrub mostly less than 2 m. tall, with red-scurfy twigs; leaf-blades 
oval or elliptic, varying to broadest above or below the middle, or sometimes slightly rhombic, 
