Difference between revisions of "Codriophorus sect. Codriophorus"

Synonyms: Racomitrium sect. Papillosa Chevallier Trichostomum sect. Stenotrichum
Treatment appears in FNA Volume 27. Treatment on page 296.
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|subfamily=Grimmiaceae subfam. Racomitrioideae
 
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Latest revision as of 21:26, 5 November 2020

Stem sparingly or freely irregularly, dichotomously or fasciculately branched, sometimes filiform and almost unbranched, absent short, lateral tuft-like branchlets. Leaves lingulate, elliptic, broadly ovate, ovate- or oblong-lanceolate to broadly or occasionally narrowly lanceolate; margins 1–2(–4)-stratose, recurved, reflexed, incurved or plane on both sides; apices narrowly to broadly rounded-obtuse or long acuminate to acute, muticous or very rarely shortly hyaline-tipped, entire or sharply to bluntly, remotely irregularly toothed, erose-dentate, sinuate to cristate in the upper 1/5–1/4; costa strong and broad, ceasing in mid leaf to subpercurrent, in transverse-section 2–4-stratose in the distal and medial parts, weakly to strongly convex, reniform, crescent-shaped to semi-terete abaxially, flat or convex on the adaxial side, in the basal part 3–6(–7)-layered, situated at the bottom of a shallow or deeper, usually wide-angled groove, lunate, reniform or rectangular and distinctly flattened, strongly convex on the abaxial side; basal marginal laminal cells not differentiated; distal laminal cells 1- to variously 2-stratose, irregularly rounded-quadrate, subquadrate, oval to rounded-hexagonal, strongly papillose to smooth, straight-walled in the distal part.

Distribution

North America, South America (Colombia), Eurasia, n Africa, Atlantic Islands (Azores, Canary Islands, Iceland, Madeira).

Discussion

Species 9 (6 in the flora).

Members of sect. Codriophorus are recognized by their lingulate, broadly ovate to ovate- or oblong-lanceolate leaves, isodiametric and straight-walled distal laminal cells, and costa that is broad and robust, usually over 100 µm wide at the base. The costa is situated in a shallow, wide-angled groove and is mostly 2–4-stratose in the distal and medial parts, 3–6(–7)-stratose in the basal part, and anatomically strongly differentiated.

Selected References

None.

Key

1 Laminal cells smooth or very slightly papillose on young leaves; leaf margins entire or with a few irregular teeth at the apex. Codriophorus depressus
1 Laminal cells distinctly papillose; leaf margins remotely irregularly toothed, erose-dentate, sinuate to cristate in the distal 1/5-1/4, if entire then broadly rounded-obtuse > 2
2 Leaves lanceolate; apex irregularly bluntly erose-dentate; costa markedly convex and crescent-shaped abaxially. Codriophorus ryszardii
2 Leaves lingulate, elliptical to broadly ovate or ovate-lanceolate; apex broadly rounded-obtuse to acute, irregularly dentate to entire > 3
3 Costa subpercurrent, entire and only shortly forked at the tip > 4
3 Costa extending 1/2-3/4 way up the leaf, distinctly spurred > 5
4 Laminal cells strongly papillose, 1- or very rarely 2-stratose; leaves unbordered. Codriophorus acicularis
4 Laminal cells indistinctly papillose over the cell walls, always variously 2-stratose in the distal part; leaves distinctly bordered with fleshy and broad limbidia. Codriophorus norrisii
5 Leaf apex broadly rounded, flat to subcucullate, always entire or sometimes sinuate to remotely bluntly erose-dentate. Codriophorus mollis
5 Leaf apex broadly rounded-obtuse to subacute, often tubular, strongly dentate or very rarely subentire. Codriophorus aduncoides
Halina Bednarek-Ochyra +  and Ryszard Ochyra +
P. Beauvois +
North America +, South America (Colombia) +, Eurasia +, n Africa +, Atlantic Islands (Azores +, Canary Islands +, Iceland +  and Madeira). +
Mém. Soc. Linn. Paris +
Racomitrium sect. Papillosa +  and Trichostomum sect. Stenotrichum +
Codriophorus sect. Codriophorus +
Codriophorus +
section +