Trichodon cylindricus

(Hedwig) Schimper

Coroll. Bryol. Eur., 36. 1856,.

Basionym: Trichostomum cylindricum Hedwig Sp. Musc. Frond., 107. 1801
Synonyms: Ditrichum cylindricum (Hedwig) Grout
Treatment appears in FNA Volume 27. Treatment on page 459.

Stems axillary hairs 2 per leaf-axil, with 2 short, brown basal-cells and 3 elongate, hyaline distal cells. Leaves 1–3 mm, acute, bases ovate; margins plane, serrate to serrulate in subulate part; costa percurrent, filling distal parts of the subula, strongly prorulose distally on abaxial surface; median cells rectangular, 17–39 × 3–5 µm, becoming larger at base. Specialized asexual reproduction sometimes present as yellowish-brown, smooth, round or irregularly shaped tubers borne on rhizoids, 65–100 µm in longest dimension; perigonia and perichaetia terminal. Seta orange to red, erect, straight, 0.3–2.7 cm, twisted when dry. Capsule slightly arcuate or sometimes straight (0.5–) 1–2 (–2.5) × 0.2–0.5 mm; operculum 0.3–0.6 mm.

Discussion

Varieties 2 (2 in the flora).

Trichodon cylindricus has a disjunct distribution in North America, where it is not uncommon in the northwestern part of the continent but is known from only a few scattered localities in the eastern part. It has been collected from only a single locality each in Michigan (Keewenaw County), New Brunswick, and Ontario, and two localities each in Newfoundland and Quebec. The distinctive gametophytes and sporophytes should aid collectors in finding additional eastern localities. The distinctive characters of this species include the small plants, 2–4 mm high, with squarrose, subulate, acute leaves, and the slender, cylindric capsules.

Selected References

None.

Key

1 Seta 0.5-2.7 cm; capsule mostly inclined, mostly slightly arcuate (sometimes straight), (0.5-)1-2(-2.5) mm; spores 9-16 µm. Trichodon cylindricus var. cylindricus
1 Seta 0.3-1.3 cm; capsule mostly erect, straight to weakly arcuate, (0.5-)1-1.5(-2) mm; spores 19- 24 µm Trichodon cylindricus var. oblongus
... more about "Trichodon cylindricus"
forming a marginal border +  and not differentiated +
Robert R. Ireland Jr. +
(Hedwig) Schimper +
Trichostomum cylindricum +
cucullate +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
yellowish;reddish-brown +
cleistocarpous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
erect;inclined +
cylindric +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
subpercurrent +
shortrectangular +  and isodiametric +
North America +  and Eurasia +
curved +  and straight +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
serrate to serrulate +
dioicous +  and sexual +
angled +, quadrate +  and rectangular +
conic +  and short-rostrate +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
on short branches +  and axillary +
enlarged +
filamentous +
Coroll. Bryol. Eur., +
papillose +
orange;red +
straight +
elongate +
0.3 cm3 mm <br />0.003 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
globose +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Ditrichum cylindricum +
Trichodon cylindricus +
Trichodon +
species +
papillose +
divided +
irregularly--shaped;round +
specialized +
synoicous +, paroicous +, autoicous +, dioicous +  and sexual +
in loose tufts +  and scattered +
light +  and yellowish green +
female +  and male +
small +  and medium-sized +