|
|
|
18. Lyonia Nuttall, Gen. N. Amer. Pl. 1: 266. 1818, nom. cons., not Rafinesque (1808).
珍珠花属 zhen zhu hua shu
Fang Ruizheng (方瑞征 Fang Rhui-cheng); Peter F. Stevens
Xolisma Rafinesque.
Shrubs or trees, deciduous or evergreen, often from underground woody burl or producing thickened horizontal underground rhizomes. Buds flattened, conical or ovoid, usually with 2 large imbricate glabrous scales. Leaves spirally arranged, petiolate; leaf blade entire [toothed in United States]. Inflorescences axillary, racemose. Flowers [4- or]5[–8]-merous. Calyx with variously estivated lobes, usually valvate in bud. Corolla white [to red], tubular or urceolate; lobes short. Filaments flattened, geniculate, with or without 1 pair of spurs at anther-filament junction; anthers dehiscing by introrse-terminal elliptic pores. Ovary superior, with many ovules per locule; stigma truncate. Capsule loculicidal, with pale ± thickened sutures sometimes separating from valves in dehiscence. Seeds oblong-ovoid or spindle-shaped to shortly linear, minute, ends often truncated.
Thirty-five species: E Asia, North America; five species (two endemic) in China.
|
|
|
|
| 1 |
Capsule with slightly thickened sutures; leaves 1.5–7 × 0.6–4 cm, apex obtuse, mucronate. |
|
(2) |
| + |
Capsule with much thickened sutures; leaves 4–20 × 2.5–12 cm, apex acuminate to abruptly acuminate. |
|
(3) |
| |
|
|
|
| 2 (1) |
Filaments with 2 spurs near apex; inflorescences 6–15 cm; rachis sparsely to densely pubescent; ovary
pubescent. |
|
4 Lyonia compta |
| + |
Filaments without spurs; inflorescences 1–4(–7) cm; rachis densely fulvous-pubescent; ovary glabrous to pubescent. |
|
5 Lyonia villosa |
| |
|
|
|
| 3 (1) |
Calyx lobes 6–11 mm; filaments without spurs; inflorescences 2–7 cm; leaf blade usually leathery. |
|
3 Lyonia macrocalyx |
| + |
Calyx lobes 2–6 mm; filaments with 2 spurs near apex; inflorescences 5–20 cm; leaf blade usually papery. |
|
(4) |
| |
|
|
|
| 4 (3) |
Rachis of inflorescences, pedicels, and abaxial surface of calyx pubescent; leaf blade apically usually acuminate. |
|
1 Lyonia ovalifolia |
| + |
Rachis of inflorescences, pedicels, and abaxial surface of calyx glabrous; leaf blade apically usually abruptly acuminate. |
|
2 Lyonia doyonensis |
|
|
|
List of lower taxa
| Related Links (opens in a new window) |
|
Treatments in Other Floras @ www.efloras.org
Other Databases
|
|
|
|
|
|
|
|
|
