Hennediella heimii

(Hedwig) R. H. Zander

Bull. Buffalo Soc. Nat. Sci. 32: 248. 1993,.

Basionym: Gymnostomum heimii Hedwig Sp. Musc. Frond., 32. 1801
Synonyms: Desmatodon heimii (Hedwig) Mitten Pottia heimii (Hedwig) Fürnrohr
Treatment appears in FNA Volume 27. Treatment on page 636. Mentioned on page 19, 29, 594, 635.

Leaves ovate to broadly lanceolate, tubulose and stiff; distal margins with a 1-stratose border of elongate cells, distal lamina cells 10–16 µm. Sexual condition monoicous, either synoicous or autoicous. Sporophytes often present. Seta 5–15 mm. Capsule stegocarpous, systilius; theca wide-mouthed, 1–2.4 (–3.5) mm; peristome absent.

Distribution

V27 935-distribution-map.gif

North America, s South America, Europe, Asia, Pacific Islands (New Zealand), Australia, Antarctica

Discussion

Varieties 15 (2 in the flora).

In Hennediella heimii, European infraspecific taxa attributed to the flora area are not distinct in the New World (see R. T. Wareham 1939). S. Flowers (1973) may have included H. stanfordensis in his concept of this species, judging from the description, illustrations and his attribution of dioicy. However, like H. stanfordensis, this species may have gemmae borne on proximal rhizoids. This taxon exhibits polymorphisms (discussed by Wareham) with considerable variation in differentiation of the leaf border of elongate cells and marginal dentition, the distal cell ornamentation, and in length of capsule. It may be confused with Tortula obtusifolia but that species has no trace of marginal dentition and is yellow in KOH.

Selected References

None.

Key

1 Leaves ovate to broadly lanceolate, tubulose but not concave or cucullate, apex acute, margins dentate distally, costa percurrent. Hennediella heimii var. heimii
1 Leaves broadly ovate to broadly elliptic, concave and often cucullate, apex usually obtuse, margins usually entire, costa often ending before the apex Hennediella heimii var. arctica
... more about "Hennediella heimii"
0.4 cm4 mm <br />0.004 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
channeled +  and plane +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Obtuse (?) +  and Acute (?) +
Richard H. Zander +
(Hedwig) R. H. Zander +
round +  and elliptic +
papillose +  and smooth +
usually slightly wider +
usually ovate;oblong +
not differentiated +
Gymnostomum heimii +
obovoid +
flaring +  and cucullate +
stegocarpous +
dioicous +, cladautoicous +, autoicous +, sexual +  and asexual +
flat +  and weakly convex +
thin;evenly thickened +
vesiculose +  and thick-walled +
3 (?) +  and 4 (?) +
elongate +
tomentose +  and bare +
short-excurrent +  and percurrent +
2-3-stratose +, thick-walled +  and bordered +
shortrectangular;quadrate;hexagonal +
North America +, s South America +, Europe +, Asia +, Pacific Islands (New Zealand) +, Australia +  and Antarctica +
differentiated +
multicellular +
yellow +  and orange-red or red +
autoicous +, synoicous +, monoicous +  and sexual +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
ovate +  and broadly lanceolate +
somewhat larger +
dentate +  and entire +
denticulate +
conic;rostrate +
photosynthetic +
simple +  and hollow +
6 +  and 8 +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
of 32 long , filamentous teeth +  and rudimentary +
1 (?) +, 4 (?) +  and 6 (?) +
Bull. Buffalo Soc. Nat. Sci. +
straight +
elongate +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
2 +  and 1 +
red +  and laminal +
spreading;incurved;appressed +
rounded-triangular +  and rounded-pentagonal +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Desmatodon heimii +  and Pottia heimii +
Hennediella heimii +
Hennediella +
species +
wide-mouthed +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
ovate;cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
yellow distally and red +, orange +, red +  and yellow +
stemless +  and perigoniate +
reddish-brown;green +
occasionally smaller than the perichaetiate +