|
3. Carpinus Linnaeus, Sp. Pl. 2: 998. 1753.
鹅耳枥属 e er li shu
Trees, sometimes shrubs, deciduous; bark fissured or smooth. Stipules deciduous. Leaves alternate, irregularly and doubly or simply serrate. Male inflorescence pendulous, spicate-cymose, cylindric, enclosed by buds during winter, with many overlapping bracts; flowers without bracteoles or perianth; stamens 3-12, inserted at base of bracts; filaments forked at apex; anthers 2-loculed, thecae separate, pubescent at apex. Female inflorescence terminal or axillary on dwarf shoots, racemose; flowers paired; bracts leaflike, complanate, overlapping, 2- or 3-lobed at base. Nutlet ribbed, enclosed by lobes of bracts or not.
About 50 species: China, India, Japan, Korea, Laos, Myanmar, Nepal, Thailand, Vietnam; Europe, North and South America; 33 species (27 endemic) in China.
Because of inadequate material, Carpinus fargesiana has not been included in the key.
|
|
|
|
| 1 |
Bracts of female flowers densely overlapping, with an inflexed lobe or auricle at base of inner margin, completely covering nutlet; nutlet with very faint ribs. |
|
(2) |
| + |
Bracts of female flowers loosely overlapping, with an inflexed or flattened lobe or auricle at base of inner margin, not completely covering nutlet; nutlet with prominent ribs. |
|
(4) |
| |
|
|
|
| 2 (1) |
Female inflorescence to 50 cm; leaves ovate-lanceolate or elliptic-lanceolate, lateral veins 24-34 on each side of midvein |
|
1 Carpinus fangiana |
| + |
Female inflorescence to 15 cm; leaves ovate, ovate-oblong, elliptic, or ovate-elliptic, lateral veins (10-)15-25 on each side of midvein. |
|
(3) |
| |
|
|
|
| 3 (2) |
Leaves with 20-25 lateral veins on each side of midvein; inner margin of bracts subentire |
|
2 Carpinus rankanensis |
| + |
Leaves with (10-)15-20 lateral veins on each side of midvein; inner margin of bracts serrate |
|
3 Carpinus cordata |
| |
|
|
|
| 4 (1) |
Bracts with lobes at bases of inner and outer margins. |
|
(5) |
| |
|
|
|
| 5 (4) |
Bracts 2.5-3 cm, with subequal lobes at bases of both margins; nutlet 5-6 mm |
|
4 Carpinus tientaiensis |
| + |
Bracts 1.5-2(-2.5) cm, with unequal lobes at bases of both margins; nutlet 3-4 mm. |
|
(6) |
| |
|
|
|
| 6 (5) |
Petiole robust, 4-7 mm, densely pubescent; nutlet with dense, brown, resinous glands and light yellow resin; outer margin of bracts entire or undulate-serrate |
|
5 Carpinus londoniana |
| + |
Petiole slender, (1-)1.5-3 cm, glabrous; nutlet with sparese, brown, resinous glands; outer margin of bracts dentate |
|
6 Carpinus viminea |
|
|
|
List of lower taxa
| Related Links (opens in a new window) |
|
Treatments in Other Floras @ www.efloras.org
Other Databases
|
|
|
|
|
|
|
