Notes on Early Land Plants Today. 44. Comments on sexuality in Solenostoma (Solenostomataceae, Marchantiophyta) and on some newly described taxa

Abstract

The sexuality of Solenostoma species is discussed and it is concluded that Solenostoma sanguinolentum is heteroicous. This and other morphological differences from Solenostoma marcescens are discussed and they are considered to belong to the same species. Heteroicity probably also occurs in Solenostoma micranthum and possibly in other Solenostoma species. Solenostoma rossicum and Solenostoma pyriflorum subsp. purpureum are new synonyms to Solenostoma sphaerocarpum. Solenostoma ochotense is a new synonym to Solenostoma hokkaidense. Solenostoma costaricanum is a new synonym to Solenostoma amoenum. Plectocolea subbalfourii is a new synonym to Solenostoma balfourii. Solenostoma rubrum var. underwoodii is a new synonym to Solenostoma rubrum. Plectocolea yunnanensis is a new synonym to Solenostoma sikkimense. Solenostoma inundatum var. grandirete is a new synonym to Solenostoma orbiculatum. Solenostoma kurilense and Solenostoma ovalifolia are new combinations and Solenostoma philippinense a new species.

Further note on Solenostoma marcescens (Mitt.) Bakalin (Hepaticae)

“…I was able to find specimens named both as S. sanguinolentum or S. marcescens in NICH, BM, G, NY, TNS and MO. Certainly I was able to check only a part of materials that apparently was studied by Váňa et al (2013). However my opposite conclusion retained, thus the additional evidence seems worthy be presented and discussed in the present paper.…”

“…However Bakalin (2013) found these two species distinct enough, resurrecting the species status for J. marcescens, transferring it to the genus Solenosotoma. The acceptance of S. marcescens as a separate species was criticized by Váňa et al (2013) in the discussion on sexual conditions in the genus Solenostoma. According to these authors, S. marcescens and S. sanguinolentum are connected by transitional forms in such features as inflorescence type, perianth wall structure, size, color and leaf cells features.…”

“…According to these authors, S. marcescens and S. sanguinolentum are connected by transitional forms in such features as inflorescence type, perianth wall structure, size, color and leaf cells features. Unfortunately Váňa et al (2013) in the most cases did not provide the references to the specimens examined and listed only herbaria where S. sanguinolentum and S. marcescens was studied. I was able to find specimens named both as S. sanguinolentum or S. marcescens in NICH, BM, G, NY, TNS and MO.…”

“…Along with morphological study I made the photographs for lectotypes of the both S. marcescens and S. sanguinolentum those are published for the first time and thus let to avoid artifacts that may appear in line drawings. OBSERVATIONS The main statement of Váňa et al (2013) is that the difference in sexuality is not stable in "Solenostoma sanguinolentum s.l. ", thus dioicous S. sanguinolentum and paroicous S. marcescens can be considered to be conspecific.…”

“…These androecial plants are highly distinctive from female due to considerable smaller width of branches. Although Váňa et al (2013) mentioned a supposedly pure male branch in the lectotype of S. marcesce1ns, I inclined to treat it as an undeveloped paroicous branches. In any case the characteristic of these "pure androecial shoots" are strikingly different from those in the lectotype of S. sanguinolentum.…”