Ceratodon purpureus subsp. conicus

(Hampe) Dixon

Stud. Handb. Brit. Mosses, 68. 1896,.

Basionym: Trichostomum conicum (Hampe) Lindberg in Müller Hal., Syn. Musc. Frond. 1: 575. 1849
Synonyms: Ceratodon conicus
Treatment appears in FNA Volume 27. Treatment on page 447.

Plants in compact mats, usually yellow-green. Stems (0.2–) 0.3–0.6 (–3) cm. Leaves straight to slightly twisted when dry, usually forming a comal tuft, slightly spreading when wet, 0.6–1.2 mm, margins often entire; costae long-excurrent as a smooth awn on many leaves, awns sometimes as long as leaf-blade. Seta yellow to yellow-orange. Capsule usually slightly inclined to erect, usually straight, (0.8–) 1–1.8 (–2.2) mm, pale-brown to yellow (golden) orange, smooth to sulcate when dry, usually weakly strumose. Peristome teeth faintly bordered to unbordered, usually with 5–9 articulations.


Phenology: Capsules mature early summer–late fall.
Habitat: Common on calcium-rich soils of arid habitats
Elevation: moderate elevations (300-800 m)

Distribution

V27 644-distribution-map.gif

B.C., Idaho, Minn., Oreg., Wash., Eurasia, n Africa, Atlantic Islands (Canary Islands)

Discussion

Subspecies conicus is apparently widespread in some arid regions of western North America. J. S. Burley and N. M. Pritchard (1990) considered its status in North America to be uncertain. However, fertile collections, although uncommon, fit well within their concept. It appears to be widespread in the semi-arid steppe regions of central Washington and adjacent British Columbia. In these arid habitats, it is often admixed with other low-growing species (e.g., Bryum spp. and Didymodon spp.) as part of the biological crust community.

Selected References

None.

Lower Taxa

None.
forming a marginal border +  and not differentiated +
Terry T. McIntosh +
(Hampe) Dixon +
finely papillose;spinulose-papillose +
Trichostomum conicum +
cucullate +
smooth +  and sulcate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
pale-brown;yellow orange +
cleistocarpous +
free;united +
usually slightly inclined;erect +
0.1 cm1 mm <br />0.001 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
deciduous +
long-excurrent +
subpercurrent +
shortrectangular +  and isodiametric +
B.C. +, Idaho +, Minn. +, Oreg. +, Wash. +, Eurasia +, n Africa +  and Atlantic Islands (Canary Islands) +
moderate elevations (300-800 m) +
Common on calcium-rich soils of arid habitats +
straight +
triangular-lanceolate +, ovatelanceolate +, lanceolate +  and crisped +
quadrate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
smooth +  and serrate +
obtuse;recurved;rarely plane +
dioicous +  and sexual +
rounded +  and angled +
shortrectangular +
conic +  and long-conic +
abruptly subulate +  and gradually acuminate +
with a longer , broader sheathing base +  and differentiated +
long-acuminate +, short-acuminate +, concave +  and ovate +
on short branches +  and axillary +
faintly bordered +  and unbordered +
Capsules mature early summer–late fall. +
well-developed +
filamentous +
Stud. Handb. Brit. Mosses, +
papillose +
free;united +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
yellow;yellow-orange +
elongate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
globose +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Ceratodon conicus +
Ceratodon purpureus subsp. conicus +
Ceratodon purpureus +
subspecies +
specialized +
synoicous +, paroicous +, autoicous +, dioicous +  and sexual +
female +  and male +
small +  and medium-sized +