References in periodicals archive ?
Megalastrum pubirhachis is distinctive by pinna rachises abaxially with linear denticulate scales and dense, even, retrorsely strigose hairs.
2 mm long, 1-3-celled, spreading to retrorsely strigose, the scales 3.
2 mm long, 1-or 2-celled, and spreading to retrorsely strigose.
0 mm long, 4-7-celled, spreading to antrorsely strigose, scales like those on the abaxial surfaces; costules abaxially rarely glandular, pubescent, scaly, the glands ca.
4) mm long, 2- or 3-celled, strigose or appressed to ascending, the scales 2.
8 mm long, 4-6-celled, light brown, ascending, antrorsely strigose, acicular; basal basiscopic pinnules of medial pinnae not enlarged or overlapping the lamina rachis; costules abaxially eglandular, glabrous or sparsely pubescent, scales absent, the hairs (when present) 0.
Plants terrestrial; rhizomes erect to decumbent; petioles scaly toward the base, with 4-10 vascular bundles, the two adaxial bundles enlarged; laminae 1-pinnate-pinnatifid to 4-pinnate-pinnatifid, catadromic above the basal pinnae; basal pinnae inequilateral and more developed on the basiscopic side or (less commonly) equilateral; rachises, costae, and costules not grooved or only shallowly so adaxially, scaly and pubescent abaxially, densely pubescent on the adaxial surfaces, the hairs whitish, spreading to antrorsely strigose, multicellular, if glands present, these ca.
5-1 mm long), subentire to denticulate, linear, subappressed, adaxially non-glandular, pubescent, hairs ascending to antrorsely strigose, ca.
Megalastrum inaequale is characterized by slightly antrorsely strigose hairs on the pinna rachises and costules abaxially and moderately dense, subbullate scales on the axes (Fig.