Botrychium sect. Sceptridium

Sect. Sceptridium (Lyon) R. T. Clausen

Mem. Torrey Bot. Club 19(2): 24. 1938.

Basionym: Undefined sect. Sceptridium Lyon Bot. Gaz. 40: 457. 1905
Treatment appears in FNA Volume 2.

Roots usually 10 or less, blackish, 1–4 mm diam. 1cm from base. Plants over 12 cm. Common stalk lacking idioblasts. Trophophore erect, long-stalked, arising from basal portion of common stalk near ground level; blade usually 1 per plant, appearing in spring, dying the following spring, present during winter, deltate, 2–4-pinnate, mostly 5–25 cm wide when mature, herbaceous or leathery. Leaf primordia densely hairy, hairs 1.5–2mm. Leaf-sheath closed. Pinna divisions reduced in size to tip (except B. biternatum, B. dissectum, and B. oneidense with undivided tips larger than lateral pinnae). First pinnule on basal pinnae usually borne basiscopically. Sporophore long-stalked, arising from basal portion of common stalk near ground level, commonly absent or represented by hairy rudiment due to abortion, or falling off, stalks and rachis only slightly flattened, not fleshy, 0.5–0.8 mm wide. x =45.

Discussion

Species 13 (6 in the flora).

Selected References

None.

Acute (?) +  and Rounded (?) +
Warren H. Wagner Jr. +  and Florence S. Wagner +
Sect. Sceptridium (Lyon) R. T. Clausen +
Undefined sect. Sceptridium +
simple +  and 5-pinnate +
4 cm40 mm <br />0.04 m <br /> (25 cm250 mm <br />0.25 m <br />) +
deltate +
? (?) +  and ? (?) +
5cm;25cm +
Worldwide +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
of widely scattered , long , uniseriate hairs +
dentate;lacerate +
spreading;ascending +
epiphytic +  and terrestrial +
spore-bearing +  and laminate +
photosynthetic +
with long , uniseriate hairs +  and glabrous +
Mem. Torrey Bot. Club +
flattened +
not fleshy +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
with corky ridges +  and smooth +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not proliferous +
sessile +  and short-stalked +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
thick-walled +  and trilete +
represented by hairy rudiment +
flattened +
not fleshy +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
unbranched +  and simple +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
tuberculate +  and rugate +
Botrychium sect. Sceptridium +
Botrychium subg. Sceptridium +
section +
arising +  and erect +
anastomosing +
Pinnate (?) +  and Fan (?) +