Callicladium haldanianum

(Greville) H. A. Crum

Bryologist 74: 167. 1971.

Basionym: Hypnum haldanianum Greville Ann. Lyceum Nat. Hist. New York 1: 275, plate 23 [center]. 1825
Synonyms: Heterophyllium haldanianum (Greville) M. Fleischer
Treatment appears in FNA Volume 28. Treatment on page 520.

Stems 3–8 cm; cortical cells small, walls thick; pseudoparaphyllia few; rhizoids few, in clusters just below leaf insertion, smooth. Leaves crowded, upturned-homomallous particularly near branch ends, scarcely altered on drying, concave, 1–2 × 0.5–0.8 mm; alar cells enlarged, yellow-brown, walls thick, region in several rows of cells, concave; basal laminal cell walls pitted; medial cells linear, 55–95 × 5–8 µm, walls moderately thick. Seta 1.5–3.2 cm, flexuose. Capsule reddish orange-brown, 1.7–3 mm, slightly wrinkled when dry; endostome segments not or narrowly perforated along keel. Spores 10–18 µm, yellow.

Phenology: Capsules mature fall–winter.
Habitat: Logs, stumps, conifer and hardwood forests, base of trees, soil, rock, forests
Elevation: low to moderate elevations


V28 805-distribution-map.gif

B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Ariz., Conn., Del., Idaho, Ill., Ind., Iowa, Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Vt., Va., W.Va., Wis., Europe, Asia.


Callicladium haldanianum grows in flat or loose extensive mats that are usually devoid of other species. The plants are distinguished by their concave leaves, short double costa, curved nearly erect capsules, and sword-shaped, shortly tapered, somewhat flattened branches.

Selected References


Lower Taxa

... more about "Callicladium haldanianum"
Steven G. Newmaster +
(Greville) H. A. Crum +
Hypnum haldanianum +
B.C. +, Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Ariz. +, Conn. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Vt. +, Va. +, W.Va. +, Wis. +, Europe +  and Asia. +
low to moderate elevations +
Logs, stumps, conifer and hardwood forests, base of trees, soil, rock, forests +
Capsules mature fall–winter. +
Illustrated +
Heterophyllium haldanianum +
Callicladium haldanianum +
Callicladium +
species +