Barbula convoluta var. eustegia

(Cardot & Thériot) R. H. Zander

Bryologist 100: 520. 1998,.

Basionym: Barbula eustegia Müller Hal. & Kindberg Bot. Gaz. 30: 17, plate 4, fig. 1. 1900
Synonyms: Barbula chrysopoda H. A. Crum Barbula whitehouseae
Treatment appears in FNA Volume 27. Treatment on page 532. Mentioned on page 530, 534.

Specialized asexual reproduction, when present, as spheric tubers on proximal rhizoids buried in soil. Perichaetial leaves weakly differentiated, loosely sheathing, apex abruptly acute to subulate and laminal cells often quadrate and papillose in distal 1/4.


Phenology: Capsules mature late spring, summer–fall (May, Jun, Jul, Oct).
Habitat: Sandy banks, soil, logs, in pine woods, shores
Elevation: low to high elevations (50-3100 m)

Distribution

V27 763-distribution-map.gif

B.C., Calif., Idaho, Ill., Mont., Oreg., Tex., Utah, Wash.

Discussion

Variety eustegia has the same gametophytic characteristics as the typical variety, including perigoniate buds on the soil at the base of the archegoniophores and the large rhizoid-borne tubers in the soil. Barbula sect. Convolutae in Europe has apparently differentiated into a number of distinct species and varieties, as discussed by K. G. Limpricht ([1884–]1890–1903, vol. 2) and A. Casares-Gil and A. Caballero (1919–1932, vol. 2), most of which, however, are not found in the flora area (R. H. Zander 1979). Plants in the type collection of var. eustegia are smaller than average for the species, but other collections (e.g., types of B. whitehouseae and B. chrysopoda) may have the large size of, e.g., the European var. commutata (J. Juratzka) P. T. Husnot. Large plants of any variety growing in mesic environments are more likely to have recurved leaf margins. Although W. C. Steere (1938) and H. A. Crum (1965c) have commented on the similarity of this taxon to the European B. enderesii Garovaglio (as B. flavipes Bruch & Schimper), specimens of the latter I have seen commonly have narrowly acuminate leaves (but the same small antheridiate plants). Three specimens: Utah, Salt Lake County, Flowers 3151, 7291, COLO; and British Columbia, Vancouver Island, Schofield 28431, DUKE) are clearly intermediates in the important characters distinguishing between var. convoluta and var. eustegia.

Selected References

None.

Lower Taxa

None.
quadrate +  and elongate +
differentiated +
long-excurrent +  and short-excurrent +
apiculate +  and entire +
Richard H. Zander +
(Cardot & Thériot) R. H. Zander +
short;elongate +
semilunar +
papillose +  and smooth +
usually slightly wider +
differentiated +
widened +
Barbula eustegia +
obovoid +
cucullate +
stegocarpous +
dioicous +  and sexual +
flat to bulging +
thin;evenly thickened +
1 (?) +  and 6 (?) +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
rectangular +
quadrate;quadrate +
B.C. +, Calif. +, Idaho +, Ill. +, Mont. +, Oreg. +, Tex. +, Utah +  and Wash. +
low to high elevations (50-3100 m) +
differentiated +
multicellular +
Sandy banks, soil, logs, in pine woods, shores +
yellow +  and orange-red or red +
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 +
long-ligulate +
ovate +  and lanceolate +
reduced +
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
dentate +  and entire +
long-conic +
photosynthetic +
2 +  and 3 +
obtuse +  and broadly acute +
lateral +  and terminal +
lateral +  and terminal +
red +, orange +  and yellow +
consisting of 16 mostly 2 times cleft spiculose striate or papillose lanceolate teeth , , , , +  and rudimentary +
Capsules mature late spring, summer–fall (May, Jun, Jul, Oct). +
archegoniate +
straight +
elongate +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
2 +  and 1 +
yellowish orange +, yellow +  and laminal +
rounded-triangular +  and rounded-pentagonal +
short +  and elongate +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Barbula chrysopoda +  and Barbula whitehouseae +
Barbula convoluta var. eustegia +
Barbula convoluta +
variety +
ovate;long-cylindric +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
spheric +
red +  and yellow +
thin +  and evenly thickened +
short-stemmed +  and antheridiate +
yellowish-brown;reddish-brown +
occasionally smaller than the perichaetiate +