Hyophiladelphus

(Müller Hal.) R. H. Zander

Bryologist 98: 372. 1995 ,.

Etymology: Genus Hyophila and Greek adelphus, brother
Basionym: Barbula sect. Hyophiladelphus Müller Hal. Syn. Musc. Frond. 1: 604. 1849
Synonyms: Barbula subg. Hyophiladelphus (Müller Hal.) R. H. Zander
Treatment appears in FNA Volume 27. Treatment on page 527. Mentioned on page 478.
 TaxonIllustrator 
Pott Hyophiladelphus agrarius.jpegHyophiladelphus agrariusPatricia M. Eckel

Plants loosely cespitose to gregarious, blackish green distally, brown proximally. Stems very short, to 0.2 cm, central strand present, sclerodermis absent, hyalodermis absent; axillary hairs 2–3 cells long, all hyaline. Stem-leaves appressed when dry, weakly spreading when moist to rosulate, oblong, 1.2–2 mm, elliptic or spathulate, distal lamina broadly channeled to deeply concave, margins plane, entire; apex broadly acute; base oblong or not differentiated, alar region often enlarged and bulging; costa percurrent to shortly and stoutly excurrent, adaxial superficial cells elongate, (2–) 4 rows of cells across costa adaxially at mid leaf, costal transverse-section oval to circular, two stereid bands present, adaxially small, epidermis differentiated adaxially, present or occasionally absent abaxially, guide cells 2 in 1 layer, hydroid strand absent, distal laminal cells subquadrate to subrectangular, occasionally rhomboid, walls thin, occasionally evenly thickened, superficially adaxially bulging, abaxially flat, (8–) 11–13 (–15) mm wide, 1–2: 1; papillae absent; proximal cells differentiated across leaf in a small area or up to 1/3 leaf length, alar cells often sharply bulging, proximal cells rectangular and curved. Specialized asexual reproduction absent. Sexual condition dioicous. Perichaetia terminal, interior leaves ovate, weakly sheathing in proximal 1/2–2/3, proximal cells rhomboid. Seta 0.4–1 cm. Theca (0.3–) 1–1.7 mm, cylindric to elliptic, annulus deciduous, revoluble, 1–2 rows of strongly vesiculose cells; peristome teeth of 32 narrow rami, filamentous, 500–1200 µm, twisted counterclockwise, operculum long-conic. Calyptra cucullate. Spores small, 9–11 µm. Distal laminal KOH color reaction strongly yellow orange, occasionally medium orange.

Distribution

se United States, Caribbean region and bordering areas

Discussion

Species 1.

Hyophiladelphus has been segregated from Barbula and placed first in the Pottioideae (R. H. Zander 1995), then back into Barbuloideae (Zander 2006). Barbula sect. Agrariae Steere in Grout is an illegitimate name that has been used for this taxon. The gametophytes of this genus have a distinctive combination of broad leaves and two stereid bands in the costa.

... more about "Hyophiladelphus"
elongate +  and quadrate +
of 1-2 rows +  and differentiated +
long-excurrent +  and short-excurrent +
Richard H. Zander +
(Müller Hal.) R. H. Zander +
reniform +  and rounded +
papillose +  and smooth +
usually slightly wider +
not differentiated +
Barbula sect. Hyophiladelphus +
obovoid +
cucullate +
cleistocarpous +  and stegocarpous +
monoicous +, dioicous +  and sexual +
flat to bulging +
few +  and several +
elongate-rhomboid +  and elongate +
tomentose +  and bare +
excurrent +  and percurrent +
broadly channeled +  and deeply concave +
se United States +  and Caribbean region and bordering areas +
differentiated +
Genus Hyophila and Greek adelphus, brother +
multicellular +
yellow +  and orange-red or red +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
spathulate;elliptic;oblong +
0 (?) +  and 1/3 (?) +
usually broadly lanceolate +  and narrowly elliptical +
reduced +
long-conic +
photosynthetic +
compound +, simple +, hollow +  and solid +
flattened +  and 2-fid +
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 +
dioicous +, sexual +  and asexual +
zander1995a +
enlarged +
straight +
elongate +
0.4 cm4 mm <br />0.004 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2 +  and 1 +
orange +, yellow orange +  and laminal +
medium +  and small +
4 cm40 mm <br />0.04 m <br /> (10 cm100 mm <br />0.1 m <br />) +
rounded-triangular +  and rounded-pentagonal +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Barbula subg. Hyophiladelphus +
Hyophiladelphus +
Pottiaceae subfam. Barbuloideae +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
cylindric;elliptic +
0.1 cm1 mm <br />0.001 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
red +  and yellow +
11mm +  and 13mm +
stemless +  and perigoniate +
brown;blackish green +
plant +, loosely cespitose +  and gregarious +
occasionally smaller than the perichaetiate +