Parrisia Shalisko & Sundue, 2019

Shalisko, Viacheslav, Sundue, Michael A., Villalobos-Arámbula, Alma Rosa, Muñiz-Castro, Miguel Ángel & Vázquez-García, J. Antonio, 2019, Taxonomic novelties in grammitid ferns (Polypodiaceae) from the Neotropics and Madagascar supported by molecular data, Phytotaxa 394 (3), pp. 176-208 : 187-188

Parrisia Shalisko & Sundue , gen. nov. ( Fig. 2 )

Type species: — Parrisia parietina (Klotzsch) Shalisko & Sundue (= Polypodium parietinum Klotzsch ).

Basyonym: — Polypodium parietinum Klotzsch. VENEZUELA. Aragua: ad saxor. parietes humidas Colonia Tovar, Moritz 253 (holotype B!, fragment NY!, isotypes BM!, K!, P!).

Diagnosis: — Parrisia is similar to Enterosora , but differs from the latter by radial rhizomes (vs. dorsiventral), the location of sori in the medium of the vein and the presence of setae around the sori. It is distinguished from Grammitis s.s. by the absence of a dark-colored sclerotized leaf margin, and by the presence of setae on the blade. It differs from Adenophorus in lacking the uniseriate reddish glandular paraphyses and hairs, present in the latter.

Description: — Plants epiphytic, rhizomes radial, rarely dorsiventral, with golden brown or brown non-clathrate scales. Fronds monomorphic, stipes setose, brown or blackish, laminae simple, linear, linear-spathulate or linearelliptic, rounded at the apex, attenuate at the base, sinuate, sometimes lobed up to 1/3 of the distance to midrib, somewhat thick and spongy; fronds covered with septate setae, from castaneous to brown, clustered close to sori, at midrib and on the margin, as well as with simple or branched glandular hairs on both leaf surfaces; hydathodes absent; veins free, from simple to forked, rarely two times forked. Sori round or nearly so, superficial or subimpressed, exindusiate, without waxy or glandular paraphyses, located abaxially on blades in a single row on both sides from the midrib, that start at some distance from blade base, and extend up to leaf apex, sori born medially on the one-time forked vein. Sporangia with 13 to 16 thickened annulus cells.

Etymology: —Named after Barbara S. Parris (*1945), honoring her enormous contributions to grammitid ferns, particularly in the paleotropics.

Distribution: — Mexico, Guatemala, Costa Rica, Panama, Jamaica, Hispaniola, Colombia, Venezuela, Ecuador, Peru, Bolivia, Africa, Madagascar, Mascarene islands.

Generic comparison: — Parrisia belongs to grammitid genera without clearly defined hydathodes(anhydathodous), among them are Adenophorus , Chrysogrammitis Parris (1998: 909) , Ceradenia , Enterosora (including Zygophlebia ), Grammitis s.s., Lomaphlebia , Prosaptia C. Presl (1836: 165–166) and Scleroglossum Alderwerelt van Rosenburgh (1912: 37–39) . Compared to the phylogenetically related genera, it is distinguished from Grammitis s.s. by the absence of a dark-colored sclerotized leaf margin, and by the presence of setae on the blade. Adenophorus differs from Parrisia by their unique uniseriate reddish glandular paraphyses and hairs ( Ranker 2008) that are lacking Parrisia . Lomaphlebia is distinguished from Parrisia by the presence of a commissure vein at the margin of the leaf blade, thus presenting a row of areoles along the margin. Cochlidium is distinguished from Parrisia by the presence of hydathodes, the absence of dark colored setae, and presence of a coenosorus deeply immersed into the lamina in several species. Ceradenia is distinguished from Parrisia by the presence of waxy deposits of a white, yellowish, or tan color, produced by paraphyses, as well as a lack of circumsoral setae. Parrisia is distinguished from Enterosora by radial rhizomes (vs. dorsiventral), the location of sori in the medium of the vein and the presence of setae around the sori.

The following species are transferred to the new genus:

Figures

FIGURE 2. Parrisia parietina (Klotzsch) Shalisko & Sundue. A–B. Habit (Sundue et al. 3233). Photos by M. Sundue.