Hydropuntia
publication ID |
https://doi.org/ 10.11646/phytotaxa.374.1.1 |
persistent identifier |
https://treatment.plazi.org/id/347F87A1-FFA7-FFCC-FF72-FA66FEE30492 |
treatment provided by |
Felipe |
scientific name |
Hydropuntia |
status |
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Hydropuntia View in CoL subgenus Polycavernosa (C.F. Chang et B.-M. Xia) Gurgel, J.N.Norris et Fredericq, stat. et subgen. nov.
TYPE: Polycavernosa C.F. Chang et B.- M. Xia 1963: 120.
TYPE SPECIES: Polycavernosa fastigiata C.F. Chang et B.- M. Xia 1963: 120, pl. I: figs.1–12; pl. II: figs. 1–6. HOLOTYPE: AST 60- 7240. Note: now Hydropuntia edulis (S.G. Gmelin) Gurgel et Fredericq 2004: 155 , basionym: Fucus edulis S.G.Gmelin, 1763: 113 .
TYPE LOCALITY: Yinggehai, SE end of Hainan Island, Hainan Province, South China Sea, China.
PERTINENT SYNONYM: Hydropuntia fastigiata ( C. F.Chang et B.- M.Xia) M. J. Wynne 1989: 477.
DESCRIPTION: Thalli erect, attached by a rhizomatous base, terete throughout, branching without constriction at bases of branches, highest order branches usually bifid, tapered gradually to acute tips. Gonimoblast cells ovoid to fusiform, forming a spherical central mass; tubular nutritive cells issued only from gonimoblast base and fusing with cells of the inner pericarp, these in turn uniting to form a network of darkly staining stellate fusion cells; innermost cells of the pericarp not stretching during cystocarp development. Spermatangial conceptacles of the medullary type, protruding slightly from the surface at maturity; young conceptacles embedded in cortex and medulla, multicavitied, the cavities separated by thin layers of wall material, with a single opening formed above the level of the surface cortical cells, probably by the rupture of an outer cuticle; cavities enlarging in all directions displacing neighboring cortical cells and compressing them while maintaining their pit connections, sometimes surrounding a cortical cell during enlargement; breakdown of cross walls between globular portions of multi-cavitied conceptacles sometimes resulting in a single large-lobed conceptacle; spermatangia cut off inwardly into conceptacle cavity from spermatangial parent cells. Tetrasporangia subspherical, cruciately divided, slightly protruding with flattened or elongated cells present adjacent to the tetrasporangium.
REMARKS: The gonimoblast mass (placenta) in H. sect. Polycavernosa is not spherical, but characterized by a lobed morphology, and the inner gonimoblasts are usually composed of rounder and smaller cells compared to those in the genus Crassa .
PERTINENT SPECIES IN SUBGENUS POLYCAVERNOSA : Hydropuntia edulis (S.G. Gmelin) Gurgel et Fredericq ; H. preissiana (Sonder) Gurgel et Fredericq ; H. rangiferina (Kützing) Gurgel et Fredericq ; and H. perplexa (K.Byrne et Zuccarello) Conklin in Conklin et al. (2014), plus the following species based on other published studies or unpublished data:
B |
Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet |
M |
Botanische Staatssammlung München |
I |
"Alexandru Ioan Cuza" University |
AST |
University of Aston |
C |
University of Copenhagen |
F |
Field Museum of Natural History, Botany Department |
J |
University of the Witwatersrand |
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