Thelypteris hatchii A.R.Sm.
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Authority
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
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Family
Thelypteridaceae
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Scientific Name
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Description
Species Description - Rhizomes erect or suberect, caudices to 25 cm long; fronds monomorphic, or nearly so; stipes brownish, 20–45 cm long, puberulous, the hairs stellate, ca. 0.1 mm long; blades dark green, 30–50 cm long, with a hastate subconfluent terminal segment; pinnae 9–14 pairs, sessile or the proximal ones with a stalk to 1 mm, to 20 x 2.7 cm, incised ca. 0.5–0.6 the way to costae proximal 1–3 pairs deflexed and slightly narrowed towards their bases, also slightly shortened; segments suboblique, subfalcate, ca. 4–6 mm wide, rounded at tips; veins 8–12 pairs per segment, the proximal pair from adjacent segments connivent at sinuses, or anastomosing at an acute angle below sinuses, less often united at oblique angles and with an excurrent vein to sinuses; indument abaxially of stellate or furcate hairs 0.1–0.2 mm long along rachises, costae, veins, and tissue between veins, hairs densest along costae, also with a few longer acicular hairs, especially along the costae and veins, on both sides with appressed sessile stellate hairs between the veins; sori medial to supramedial, with indusia small, persistent, bearing simple or furcate hairs 0.1 mm long; sporangia glabrous; 2n =72 (Oax).
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Discussion
Goniopteris hatchii (A. R. Sm.) A° . Lo¨ve & D. Lo¨ve, Taxon 26: 326. 1977. Type. Guatemala. Alta Verapaz: Senahu, Cerro Sillab, Hatch & Wilson 159 (US!).
Thelypteris hatchii is closely allied to T. biolleyi, agreeing with that species in having appressed sessile stellate hairs on both sides of the laminae between the veins. The two species differ in the absence of anchor-shaped hairs on the costae abaxially in T. hatchii.
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Distribution
In wet forests, along trails and streams; 200– 1700 m. Mexico; Guat, Hond, CR.
Mexico North America| Honduras Central America| Guatemala Central America| Costa Rica South America|