Donrichardsia macroneuron

(Grout) H. A. Crum & L. E. Anderson

Fieldiana, Bot., n. s. 1: 7. 1979.

EndemicSelected by author to be illustrated
Basionym: Hygroamblystegium macroneuronc Grout Bryologist 36: 1, figs. 1 – 5. 1933
Synonyms: Eurhynchium macroneuron (Grout) H. A. Crum Oxyrrhynchium macroneuron (Grout) Wynns
Treatment appears in FNA Volume 28. Treatment on page 435.
Revision as of 19:46, 24 September 2019 by FNA>Volume Importer

Stems 5–14 cm, branches to 10 mm. Stem leaves 0.9–1.5(–1.8) × 0.4–0.8 mm; costa excurrent, percurrent, or ending 3–6 cells before apex, 1/5–1/2 leaf width, sometimes laterally spurred; alar cells almost undifferentiated; laminal cells partly 2–4-stratose, 30–65 × 6–9 µm; basal cells 7–10 µm wide. Branch leaves 1–1.5 × 0.1–0.8 mm.


Habitat: Rock, shallowly submerged in calcareous springs at base of limestone slopes in narrow canyons
Elevation: moderate elevations (600 m)

Discussion

The single known locality of Donrichardsia macroneuron is Seven Hundred Springs in Edwards County. This locality was described in detail by R. Wyatt and A. Stoneburner (1980), who also tried to find more localities in similar habitats nearby, but without success. Donrichardsia macroneuron has a very broad costa reminiscent of Hygroamblystegium noterophilum. The latter species has short, oblong-rhomboidal cells, never linear and flexuose.

Selected References

None.

Lower Taxa

None.
... more about "Donrichardsia macroneuron"
Michael S. Ignatov +
(Grout) H. A. Crum & L. E. Anderson +
Hygroamblystegium macroneuronc +
moderate elevations (600 m) +
Rock, shallowly submerged in calcareous springs at base of limestone slopes in narrow canyons +
Fieldiana, Bot., n. s. +
Endemic +  and Selected by author to be illustrated +
Eurhynchium macroneuron +  and Oxyrrhynchium macroneuron +
Donrichardsia macroneuron +
Donrichardsia +
species +