Thelypteris hispidula var. versicolor

(R. P. St. John) Lellinger

Amer. Fern J. 71: 94. 1981.

Common names: Variable maiden fern St. John's shield fern
Basionym: Thelypteris versicolor (R. P. St. John) Broun in Small, Ferns S.E. States, 250, plate. 1938
Synonyms: Dryopteris versicolor E. P. St. John Thelypteris macilenta (Fée) Schelpe Thelypteris quadrangularis var. versicolor (R. P. St. John) A. R. Smith
Treatment appears in FNA Volume 2.
Revision as of 23:35, 29 July 2020 by imported>Volume Importer
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Stems short-creeping to ascending at apex, 3–5 mm diam. Leaves monomorphic, evergreen, closely placed, (20–) 40–95 cm. Petiole straw-colored, (5–) 10–40 cm × 1.5–3 mm, at base with brown, lanceolate, hairy scales. Blade 14–55 cm, proximal 0–2 (–4) pairs of pinnae slightly to greatly reduced (lowest pinnae to 1/3 length of longest), blade gradually tapered to pinnatifid apex. Pinnae 4–14 × 0.8–2 cm, incised 3/4–4/5 of width; segments spreading or somewhat oblique, rounded at tip, basal acroscopic segment of proximal pinnae sometimes auriculate and crenate; proximal pair of veins from adjacent segments united just below sinus or approaching each other and turning abruptly toward sinus, or connivent at sinus, excurrent vein, if any, 1 mm or less. Indument on both surfaces of densely set hairs 0.2–0.8 mm on costae, veins, and often blade tissue, also often of yellowish, stalked glands 0.1 mm. Sori round, medial to supramedial; indusia hairy; sporangial stalks with inconspicuous stalked, pear-shaped glands. 2n = 72.


Habitat: Woodlands and limestone sinks, especially in seepage areas and along streams
Elevation: 0–100 m

Distribution

V2 824-distribution-map.gif

Ala., Fla., Ga., La., Miss., S.C., Tex., West Indies in Cuba

Discussion

Selected References

None.

Lower Taxa

None.

"/4" is not declared as a valid unit of measurement for this property.

reduced +
Alan R. Smith +
(R. P. St. John) Lellinger +
crenate +  and auriculate +
Thelypteris versicolor +
gradually tapered +  and pinnatifid +
14 cm140 mm <br />0.14 m <br /> (55 cm550 mm <br />0.55 m <br />) +
Variable maiden fern +  and St. John's shield fern +
Ala. +, Fla. +, Ga. +, La. +, Miss. +, S.C. +, Tex. +  and West Indies in Cuba +
0–100 m +
glandular +  and hairy +
stalked;stalked +
inconspicuous +
pear--shaped +
not continuous +
Woodlands and limestone sinks, especially in seepage areas and along streams +
branched +  and simple +
transparent +
ephemeral +  and persistent +
round-reniform +
small +  and large +
monomorphic +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
evergreen +
40 cm400 mm <br />0.4 m <br /> (95 cm950 mm <br />0.95 m <br />) +
reticulate +  and echinate +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
straw-colored +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
short-stalked +  and sessile +
4 cm40 mm <br />0.04 m <br /> (14 cm140 mm <br />0.14 m <br />) +
reduced +
not +  and reduced +
Amer. Fern J. +
lanceolate +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
hairy +  and glabrous +
0.15 cm1.5 mm <br />0.0015 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
short-creeping;ascending +
Dryopteris versicolor +, Thelypteris macilenta +  and Thelypteris quadrangularis var. versicolor +
Thelypteris hispidula var. versicolor +
Thelypteris hispidula +
variety +
crescent--shaped +
0.1 cm1 mm <br />0.001 m <br /> (?) +
on rock +  and terrestrial +