|
2. Ctenitis (C. Christensen) C. Christensen in Verdoorn, Man. Pteridol. 544. 1938.
肋毛蕨属 lei mao jue shu
Authors: Shiyong Dong & Maarten J. M. Christenhusz
Dryopteris subg. Ctenitis C. Christensen, Biol. Arbejder Tilegnede. Eug. Warming, 77. 1911; Ataxipteris Holttum.
Plants terrestrial, 10-140 cm tall. Rhizome short, erect to ascending, densely scaly at apex and at stipe bases. Fronds clustered; stipe dark brown to stramineous, scaly throughout; scales of two different types: (1) lanceolate, membranous, appressed, and iridescent scales, and (2) subulate, stiff, spreading scales without obvious iridescence. Lamina oblong-lanceolate to ovate-triangular, broadest at base, 1-4-pinnate; basal pair of pinnae always largest, triangular or broadly lanceolate, basal basiscopic pinnules of basal pinnae usually much enlarged; distal pinnae or pinnules ± adnate to rachis or costae and ± decurrent at their bases; veins all free, veinlets on ultimate pinnules or lobes simple or (rarely) bifurcate to pinnate; lamina texture herbaceous or papery, rarely leathery, with ctenitoid hairs on adaxial surface and short glandular hairs on abaxial surface, or rarely glabrous; costae of pinnules prominent, always covered with ctenitoid (multicellular) hairs. Sori medial or rarely submarginal; indusia present or not, sometimes very small and hidden by maturing sporangia. Perispore echinate, coarsely folded, or tuberculate. x = 41.
About 100-150 species: tropics and subtropics of America, Africa, Asia, and Australia; ten species (four endemic) in China.
|
|
|
|
| 1 |
Scales on stipe, rachis, or at least those on abaxial surface of costae lanceolate to ovate-lanceolate |
|
(2) |
| + |
Scales on stipe, rachis, and on abaxial surface of costae linear-lanceolate to subulate (inrolled and hairlike) or nearly so |
|
(5) |
| |
|
|
|
| 2 (1) |
Pinnae (except basal one) 1-pinnatifid; veinlets obscure, some veinlets between pinna lobes arising from costae; perispore coarsely folded. |
|
9 C. sinii |
| + |
Pinnae (except basal one) 2-pinnatifid; veinlets distinct, no veinlets arising from costae; perispore coarsely folded or echinate |
|
(3) |
| |
|
|
|
| 3 (2) |
Basal pinnae broadly lanceolate with symmetrical bases; perispore coarsely folded. |
|
5 C. guidianensis |
| + |
Basal pinnae deltoid with asymmetrical bases, basiscopic 2 or 3 pinnules much enlarged; perispore echinate |
|
(4) |
| |
|
|
|
| 4 (3) |
Sori indusiate, indusia usually fugacious or not well developed; widespread in SE Asia. |
|
10 C. subglandulosa |
| + |
Sori exindusiate, usually covered by scales; Hunan and Sichuan (endemic). |
|
8 C. pseudorhodolepis |
| |
|
|
|
| 5 (1) |
Lamina with 2 or 3 pairs of free pinnae; pinnae shallowly lobed; some veinlets between pinna lobes arising from costae; perispore coarsely folded. |
|
2 C. dianguiensis |
| + |
Lamina with 5-15 pairs of free pinnae; pinnae 1-3-pinnate; no veinlets or rarely a few veinlets arising from costae; perispore coarsely folded, tuberculate, or echinate |
|
(6) |
| |
|
|
|
| 6 (5) |
Stipe scales 1-3 mm, linear to subulate; sori exindusiate; perispore echinate |
|
(7) |
| + |
Stipe scales 3-8 mm, subulate; indusia persistent or partly fugacious; perispore coarsely folded or tuberculate |
|
(8) |
| |
|
|
|
| 7 (6) |
Sori usually covered by scales. |
|
3 C. dingnanensis |
| + |
Sori naked, not scaly. |
|
6 C. jinfoshanensis |
| |
|
|
|
| 8 (6) |
Free pinnae (except basal ones) of same size, 1-pinnatifid, pinna bases not broadened. |
|
7 C. mannii |
| + |
Free pinnae gradually reduced toward lamina apex, 1- or 2-pinnatifid, nearly all pinnae with broadened bases |
|
(9) |
| |
|
|
|
| 9 (8) |
Fronds > 1 m, 4-pinnate at base; stipe scales and rachis rufescent, 6-8 mm. |
|
1 C. decurrentipinnata |
| + |
Fronds < 60 cm, 2- or 3-pinnate at base; stipe scales and rachis dark brown, 3-4 mm. |
|
4 C. eatonii |
|
|
|
Lower Taxa
| Related Links (opens in a new window) |
|
Treatments in Other Floras @ www.efloras.org
Other Databases
|
|
|
|
|
|
|
