Trachyxiphium

W. R. Buck

Brittonia 39: 219. 1987.

Etymology: Greek trachys, rough, and xiphion, little sword, alluding to leaves marginally roughened by serrations
Treatment appears in FNA Volume 28. Treatment on page 256. Mentioned on page 255, 643.
 TaxonIllustrator 
PiloTrachyxiphiumHypnaceum.jpegTrachyxiphium hypnaceumPatricia M. Eckel

Plants small [to large], soft, in dense mats, yellowish to brownish or golden green to nearly hyaline, glossy. Stems irregularly branched; hyalodermis absent. Leaves somewhat to occasionally clearly complanate, flaccid, somewhat flexuose, not crisped when dry, narrowly lanceolate to ovatelanceolate, infrequently asymmetric; margins plane or broadly or narrowly recurved on one side, entire proximally, serrulate in distal 1/3; apex slenderly long-acuminate; costa 1/2–2/3 leaf length, ending in base of acumen, parallel to slightly divergent, distal abaxial surface strongly serrulate; laminal cells long-rhomboidal to linear, narrow, elongate, smooth or sometimes prorulose by projecting distal cell ends; marginal cells not forming border. Specialized asexual reproduction absent. Sexual condition synoicous (sometimes also with male and female gametoecia); perichaetial leaf apex subulate. Seta orangebrown, smooth. Capsule erect, inclined, or pendulous, ovoid; annulus absent; operculum obliquely and narrowly long-rostrate. Calyptra conic-mitrate, base fringed, often split on one side, smooth or distally slightly scabrous.

Distribution

se United States, Mexico, Central America, South America, Pacific Islands (Cocos Island)

Discussion

Species 15 (1 in the flora).

Species of Trachyxiphium occur in the Neotropics on wet soil, rock, and logs, in humid lowlands to mid elevations, occasionally upper montane forests, from near sea level to 3400 m (S. R. Gradstein et al. 2001).

Selected References

None.

"parallel" is not a number. "slightly divergent" is not a number.

... more about "Trachyxiphium"
long-acuminate +
Patricia M. Eckel +
W. R. Buck +
papillose-scabrous +
fringed +
conic-mitrate +
pendulous +, inclined +  and erect +
undifferentiated +
2;several +
se United States +, Mexico +, Central America +, South America +  and Pacific Islands (Cocos Island) +
yellow;yellowbrown +
finely papillose;nearly smooth +
Greek trachys, rough, and xiphion, little sword, alluding to leaves marginally roughened by serrations +
bordered +, trabeculate +  and furrowed +
lanceolate;lance-subulate +
smooth;1-papillose +
flexuose +
erect +, vertical +  and oriented +
narrowly lanceolate +  and ovatelanceolate +
serrulate +  and entire +
broadly +  and plane +
synoicous +, sexual +  and asexual +
small;medium-sized +
long-rostrate +
redbrown +  and dark red +
branched +  and frondose +
suberect +  and spreading +
keeled +  and lanceolate +
orangebrown +
papillose-scabrous +
elongate +
Trachyxiphium +
Pilotrichaceae +
dioicous +, synoicous +, autoicous +, polygamous +  and sexual +
yellowish +  and brownish or golden green +