1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum crystallinum Judz. & Voronts.

        This species is accepted, and its native range is Central Madagascar.

    [KBu]

    Vorontsova, M.S. 2014. Two new species of Panicum sensu lato (Poaceae: Panicoideae) from Madagascar. Kew Bulletin 69: 9511. DOI https://doi.org/10.1007/s12225-014-9511-3

    Type
    Type: Madagascar, Antananarivo, Antongona, in shade under rocks, Feb. 1963, Bosser 17188 (holotype P00524470!; isotypes P02309315!, P02309316!).
    Habit
    Delicate annual, semi-prostrate, to 15 cm tall, the culms glabrous
    Ligules
    Ligule a lacerate ciliolate membrane
    Leaves
    Leaf-blades ovate, flat, membranous, 1.5 – 2.0 × 0.3 – 0.45 cm, drying yellow-green, loosely hirsute on both sides Leaf sheaths glabrous with some cilia at the apex and on the margins
    Inflorescences
    Panicles terminal and axillary, partly or fully exserted on a peduncle to 1 cm long, 2 – 4 cm long, diffuse, the branching distichous or in threes, the branches filiform, partly divergent at maturity, glabrous or with a few white cilia, the pedicels 1 – 6 mm long
    Spikelets
    Spikelets ovoid to oblongoid, apically rounded, 0.9 – 1.1 (– 1.3) mm long, almost white, never gaping open
    Glume
    Upper glume as long as the spikelet, translucent, 3-veined, with pronounced bulbous prickle hairs between the veins Lower glume a nerveless vestige of variable shape
    Flowers
    Lower flower absent, the palea absent
    Lemma
    Lower lemma translucent, 3 – 5-veined, with pronounced bulbous pickle hairs between the veins Upper lemma smooth, shiny, pale
    Distribution
    Madagascar: High Plateau near Antananarivo. Map 1.
    Conservation
    Assessed here as Endangered (EN) under criteria B2(a): area of occupancy under 500 km2 and the species is known from fewer than five locations (IUCN 2001).
    Note
    Named after the shiny bulbous prickle hairs on the upper glume and lower lemma resembling crystals when viewed in a microscope. This species is close to Panicum mitopus and P. manongarivense but with glassy globose prickle hairs on upper glume and lower lemma, and an open panicle. It is a member of a Malagasy group of Panicum s.l. with spikelets 0.9 – 1.7 mm long, lower glume less than half as long as the spikelet with 0 – 1 veins, small plant size and a forest understory or montane Panicum crystallinum is similar to P. manongarivense A. Camus but with crystal-like bulbous prickle hairs on the upper glume and lower lemma (vs smaller not inflated prickle hairs) and auricles on mature leaves (vs auricles absent). Also similar to P. mitopus K. Schum. but spikelets 0.9 – 1.1 (– 1.3) mm long (vs 1.1 – 1.7 mm long).
    Ecology
    This group includes P. mitopus known from Tanzania and Madagascar, and five species endemic to Madagascar: P. crystallinum sp. nov., P. danguyi A. Camus, P. flacourtii A. Camus, P. manongarivense and P. vohitrense A. Camus. The occurrence of a Malagasy radiation with one widespread species also occurring in East Africa or beyond is a pattern also seen in PseudechinolaenaStapf and Poecilostachys Hack. Wet forest understory shade and rocky places. Exact elevation not known.

    Distribution

    Native to:

    Madagascar

    Panicum crystallinum Judz. & Voronts. appears in other Kew resources:

    First published in Kew Bull. 69(2)-9511: 4 (2014)

    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0