Flora of North America species comparison

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Haplocladium microphyllum
Habit Plants medium-sized.
Stem(s)

leaves erect, somewhat distant, broadly ovate to triangular, 2-plicate basally, 0.8–1.5 mm;

margins plane, somewhat recurved basally, serrulate;

costa ending in acumen or subpercurrent.
Branch leaves

somewhat distant, ovate, 0.5–0.7 mm;

apex acute to acuminate;

alar cells quadrate;

medial laminal cells subquadrate, subrhombic, or very short-rectangular, smooth to 1-papillose over lumen or shifted distally, walls somewhat thick.
Capsule

inclined to horizontal.
Spores

8–12 µm, essentially smooth.

Haplocladium microphyllum
Phenology Capsules mature year-round.
Habitat Damp wood, rock, humus, soil in woodlands
Elevation low to high elevations (0-2500 m) (low to high elevations (0-8200 ft))
Distribution
from FNA
AL; AR; AZ; DE; FL; GA; IA; IL; IN; KS; LA; MA; MD; ME; MI; MN; MO; MS; NC; ND; NE; NM; NY; OH; OR; PA; SC; TN; TX; VA; VT; WA; WI; WV; AB; BC; MB; ON; QC; Mexico; South America; West Indies; Eurasia
Discussion

Haplocladium microphyllum is the most commonly encountered species of the genus in North America, and is recognized by the frequently plicate base of the stem leaves, somewhat distant leaves when compared to the other species, and filamentous, little-branched paraphyllia that may be few and scattered or occasionally more common. Paraphyllia of H. angustifolium and H. virginianum are much more abundant, frequently branched and more commonly two or more rows of cells wide. The stem leaves of H. microphyllum are weakly decurrent with frequently flexuose acumina when dry; the branch leaves have short-rectangular, smooth, frequently reddish proximal laminal cells; and the capsules are 1.5–2 mm.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 28, p. 345.
Parent taxa Leskeaceae > Haplocladium
Sibling taxa
H. angustifolium, H. virginianum
Synonyms Hypnum microphyllum
Name authority (Hedwig) Brotherus: in H. G. A. Engler and K. Prantl, Nat. Pfla n zenfam. 229[I,3]: 1007. (1907)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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