Panicum cupressifolium A. Camus

Vorontsova, Maria S., 2018, Revision of the group previously known as Panicum L. (Poaceae: Panicoideae) in Madagascar, Candollea 73 (2), pp. 143-186: 158

publication ID

http://doi.org/ 10.15553/c2018v732a1

persistent identifier

http://treatment.plazi.org/id/03A187BA-FFD1-FF80-FFCF-FBCE19DE5219

treatment provided by

Carolina

scientific name

Panicum cupressifolium A. Camus
status

 

9. Panicum cupressifolium A. Camus   in Bull. Soc. Bot. France 72: 372. 1925 ( Fig. 6A View Fig , 7 View Fig ).

Lectotypus (designated here): MADAGASCAR. Prov. Fianarantsoa: Andringitra massif, II.1921, Perrier de la Bâthie 14548 ( P [ P00224765]!; isolecto-: E!, EA!, G [ G00022443], K [ K000244691, K000244692, K000244693, K000244694, K000244695]!, MO!, P [ P00224764, P00462677]!, PRE [ PRE0031827 View Materials -0]!, S [S-G-4484] image seen, SI!, TAN!, US [ US00147793, US00148388]!)   . Syntypus: Andringitra massif, 2.V.1911, Perrier de la Bathie 10833 ( K [ K000244697]!, P [ P00462676, P00224767, P00462675]!), TAN   !).

Woody perennial, much branched, the main stems lignified, to 50 cm tall, the culms and nodes glabrous. Leaf sheaths glabrous. Ligule absent. Leaf blades scale-like, ovate, flat, coriaceous, 0.05–0.3 × 0.05–0.2 cm, drying red-brown, imbricate, appressed, glabrous on both sides, often larger on the central stem. Spikelets terminal, rare and difficult to find, single at branch apices or rarely up to three together, nodding, elliptic, apically obtuse, c. 2.5 mm long, with poorly visible veins, whitish to purple, opening only partly. Lower glume c. ½ as long as the spikelet, chartaceous, apically obtuse, 3-veined, glabrous. Upper glume 3/4 as long as the spikelet, herbaceous, 3–5-veined, glabrous. Lower floret barren, with a reduced palea. Lower lemma herbaceous, 5-veined, glabrous. Upper lemma smooth, shiny, pale.

Distribution and ecology. – Endemic to Madagascar, restricted to high elevation and high soil moisture environments in the Andringitra massif, 2400–2700 m ( Fig. 8A View Fig ).

Notes. – Likely the most unusual of Madagascar’s grasses, P. cupressifolium   does resemble a low stature conifer when forming monotypic stands on the plateau of Andringitra National Park. Leaf blades and leaf sheaths are reduced, while inflorescences are not readily visible as they are reduced to a single spikelet (or sometimes a group of up to three spikelets) at the culm apex.

The lectotype sheet has been chosen for its high quality material and an annotation in the author’s handwriting.

Additional material examined. – MADAGASCAR. Prov. Fianarantsoa: Andringitra   , 27.XI.1924   , Humbert   3888 (G, K [ K000244696, K000805462]; ibid. loco, VI.1965 GoogleMaps   , Morat 1298 (P [ P00224766]); Andringitra, à 100 m du pic, 22°11'42"S 46°53'31"E, 28.XI.2013 GoogleMaps   , Nanjarisoa et al. 87 (K, TAN); Andringitra, Peak Boby, 22°11'41"S 46°53'07"E, 25.XI.2009   , Rakotonasolo et al. 1502 (K [ K000664083]); Sendrisoa, 18.X.1956, Rakotovao 8452 ( P [ P02251441], TAN); ibid. loco   , 12.I.1958 GoogleMaps   , Rakotovao 9913 (P [ P00224773]); Andringitra, below Imarivolanitra, 22°11'42"S 46°53'24"E, 12.XII.2013, Vorontsova et al. 1233 ( TAN); ibid. loco GoogleMaps   , 12.XII.2013, Vorontsova et al. 1237 ( TAN)   .

P

Museum National d' Histoire Naturelle, Paris (MNHN) - Vascular Plants

E

Royal Botanic Garden Edinburgh

EA

National Museums of Kenya - East African Herbarium

G

Conservatoire et Jardin botaniques de la Ville de Genève

K

Royal Botanic Gardens

MO

Missouri Botanical Garden

PRE

South African National Biodiversity Institute (SANBI)

S

Department of Botany, Swedish Museum of Natural History

SI

Museo Botánico (SI)

TAN

Parc de Tsimbazaza

US

University of Stellenbosch

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Panicum

Loc

Panicum cupressifolium A. Camus

Vorontsova, Maria S. 2018
2018
Loc

Panicum cupressifolium

A. Camus 1925: 372
1925