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FOC | Family List | FOC Vol. 2-3 | Dryopteridaceae | Bolbitis

24. Bolbitis ×laxireticulata K. Iwatsuki, Acta Phytotax. Geobot. 18: 50. 1959.

网脉实蕨 wang mai shi jue

Egenolfia laxireticulata (K. Iwatsuki) C. M. Kuo.

Rhizome shortly creeping, ca. 4 mm in diam., with sclerenchyma strands, sparsely scaly; scales brown-black, ovate-lanceolate to lanceolate, 3-4 × 1.5-2 mm, subclathrate. Sterile fronds pinnate, 30-75 cm; stipe 14-30 cm, densely scaly; lamina grayish green when dry, oblong-elliptic, widest at or below middle, 20-30 × 10-13 cm, papery, with a spherical subterminal bulbil; rachis sparsely scaly, with a narrow wing; pinnae 12-20 pairs, alternate or opposite, 4.5-7 × 1.5-2 cm, both surfaces glabrous, base sometimes symmetrical, variously cuneate, usually asymmetrical, margin ± entire to lobed to 2/5 toward costa, lobes finely crenate-serrate, with a distinct spine in each sinus, apex acute to acuminate, lowermost 2 pinnae up to 1.5 mm stalked, terminal segment triangular; veins very irregular, usually free except those along costae, forming a costal areole at least in part of pinnae of one plant. Fertile fronds: stipe 25-40 cm; lamina 14-28 cm; pinnae 10-12 pairs, oblong-lanceolate, ca. 2 × 0.4 cm, entire or undulate. Sporangia inserted mainly on veins.

On rocks along streams in rain forests; 100-900 m. Guangdong, Hainan, Taiwan [Japan (Ryukyu Islands)].

Bolbitis ×laxireticulata is a hybrid between B. appendiculata and B. subcordata.


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