Anchistea virginica

Gasper, André Luís De, Dittrich, Viníciusantonio De Oliveira, Smith, Alan R. & Salino, Alexandre, 2016, A classification for Blechnaceae (Polypodiales: Polypodiopsida): New genera, resurrected names, and combinations, Phytotaxa 275 (3), pp. 191-227 : 198-199

1. Anchistea virginica (L.) C.Presl, Abh. Königl. Böhm. Ges. Wiss., ser. 5, 6: 431. 1851.— Blechnum virginicum L., Mant. Pl. 2: 307. 1771. — Woodwardia virginic a (L.) Sm., Mém. Acad. Roy. Sci. Turin 5: 412. 1793.

Lorinseria C.Presl, Abh. Königl. Böhm. Ges. Wiss. , ser. 5, 6: 432. 1851, non Lorinsera Opiz, 1839 , a genus that seems not to be generally recognized, in Apiaceae ; if the two are considered homonymous, then Lorinseria needs conservation.— Lectotype (chosen by J. Smith, Hist. Filic. 310. 1875): Lorinseria areolata (L.) C.Presl, Abh. Königl. Böhm. Ges. Wiss., ser. 5, 6: 432. 1851. Figs. 1B , 5B .

Plants terrestrial; rhizomes long-creeping, non-stoloniferous, slender (ca. 5 mm diam.), densely clothed with brownish, ovate to broadly lanceolate, entire scales; fronds dimorphic, the fertile reddish brown; stipes slender, long, scaly at least proximally, sparsely scaly distally; blades concolorous, ovate to deltate, the sterile deeply pinnatifid, the fertile 1-pinnate, not reduced proximally, apices pinnatifid; rachises with scattered, ovate, light brown scales; buds absent; aerophores absent; pinnae not articulate to rachises, the sterile adnate, narrowly elliptic, margins serrulate, the fertile contracted, linear, attenuate at bases; veins anastomosing without included veinlets in areoles in both sterile and fertile fronds, forming a regular series of two or more rows of areoles between costae and pinna margins, veins free toward margins; sori linear-oblong, deeply sunken into blades, confined to costal areoles on each side of the costae, indusia membranaceus, the outer edge tucked around sporangia; x = 35.

Species number, comments, and distribution:— One species in eastern North America ( U.S.A. and Nova Scotia, Canada). It is easily recognized by the long-creeping rhizomes and the deeply pinnatifid sterile blades. The fertile blades are 1-pinnate and contracted.

Figures

FIGURE 1. General appearance of the three genera of Blechnaceae subfamily Woodwardioideae. A. Anchistea virginica (P01513597); B. Lorinseria areolata (P01509531), C. Woodwardia spinulosa (P01557309). Vouchers are indicated by herbarium barcodes.

FIGURE 5. Habitat of Blechnaceae genera. A. Anchistea virginica; B. Lorinseria areolata; C. Woodwardia unigemmata; D. Salpichalena volubilis; E. Stenochlaena milnei; F. Telmatoblechnum serrulatum; G. Austroblechnum penna-marina; H. Blechnidium melanopus; I. Blechnopsis orientalis. Photos from: A. The PLANTS Database, USDA, NRCS. 2016; B. James Van Kley; C. Ralf Knapp; D. Luis Adriano Funez; E. Julie F. Barcelona; F. Luis Adriano Funez; G. Vinícius A.O. Dittrich; H. Ralf Knap; I. Ralf Knap. Reproduced with permission from the authors.