Woodsia mexicana Fée

• Region

  North America

• Country

  United States of America

• State/Province

  New Mexico

• Locality

  Burro Mts., shade of rocks.

• Coordinates

  32.646, -108.48

• Coordinate Uncertainty (m)

  40638

• Georeferencing Method

  Georeferencing Quick Reference Guide (Zermoglio et. Coordinates det. as center of Big Burro (en.wikipedia.org/wiki/Big_Burro_Mountains) & Little Burro (en.wikipedia.org/wiki/Little_Burro_Mountains) Mts. Radial= distance btwn coordinates & furthest extent of Mts. Uncertainty found with MaNIS Georef Calc.

• Geodetic Datum

  WGS84

• Distribution

  Map all specimens of this taxon

Modfcrd. Mw-, S^;i8g.. ifcJftjUr,	^ jfa0§
§ 103. New or Little-Known Ferns, f the United States. No. 11.
By D. C. Eaton.
35, Woodsia Mexicana, Fée.—“ Fronds lanceolate ; pinnules
(pinnae) sub-opposite, crenate, short-stalked, very obtuse, smooth ;
stalk and rachis smoothish; sori near the margin, broad, confluent ;
receptacle dot-like, scales four, laciniated, narrow, divided at the end
into articulated hairs ; sporangia nearly sessile ; ring 18-jointed ;
spores oval.” 7me Mém. p. 66, t. 26. f. 3.
This fern is not recognized in the Synopsis Filicum, and Fournier
has referred it to IV. mollis, which is a larger and much more rigid
fern, and has the involucre at first sub-globose, and enclosing the sori.
The true W. Mexicana has the involucre cleft almost to the base into
3 to 5 segments, and these divided half-way down or more into a few
slender articulated filaments, much as in W. Oregana, but on the
whole decidedly more conspicuous. The fronds vary from 3 to 8
inches long, and might easily pass for W. obtusa, but for the involucre.
The segments of the frond are finely but rather deeply toothed, and
the teeth end in delicate and semi-transparent tips which are ciliated
in the young fronds. When the fronds are mature this ciliation mostly
disappears, and the involucre is lost, and then it becomes difficult to
distinguish the fronds from those of W. Oregana on one side, and
W. obtusa on the other.
To W. Mexicana I refer Drs. Parry and Palmer’s No. 1,000, from
near San Luis Potosi, Mexico ; Dr. Palmer’s plants from Coahuila ;
Mr. George R. Vasey’s (son of Dr. Vasey, of the Agricultural De-
partment, Washington) from Organ Mts., New Mexico (just re-
ceived); Rev. E. L. Greene’s No. 430, from Pinos Altos Mts., and
Mr. Rusby’s New Mexican fern distributed as W. Oregana, var. To
these I venture to add Mr. Charles Wright’s No. 2,120, collected in
New Mexico thirty years ago, and referred to W. obtusa in the Botany
of the Mexican Boundary.
graps-----^=
of New Mexico.
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