Panicum andringitrense 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: 148-151

publication ID

http://doi.org/ 10.15553/c2018v732a1

persistent identifier

http://treatment.plazi.org/id/03A187BA-FFDB-FF87-FC9F-FBF51F5351A0

treatment provided by

Carolina

scientific name

Panicum andringitrense A. Camus
status

 

3. Panicum andringitrense A. Camus   in Bull. Soc. Bot. France 72: 369. 1925 ( Fig. 1B View Fig , 3 View Fig ).

Lectotypus (designated here): MADAGASCAR. Prov. Fianarantsoa: massif d’Andringitra , 1600 – 2200 m, II.1922, Perrier de la Bâthie 14550 ( TAN!; isolecto-: K [ K000244686]!, P [ P00224760, P02251327]!)   . Syntypi: MADAGASCAR. Prov. Fianarantsoa: Andringitra, 1911, Perrier de la Bâthie 10793 ( P [ P00224754, P00224757]!)   ; ibid. loco, Perrier de la Bâthie 13625 ( P [ P00224759, P02251328]!)   ; ibid. loco, Perrier de la Bâthie 14414 ( P [ P02251339, unmounted]!)   .

Perennial scrambler, much branched, the main stems woody, 1–3 m long, the culms and nodes glabrous. Leaf sheaths glabrous to finely pilose. Ligule a minute membrane. Leaf blades lanceolate, flat, coriaceous, 2– 6 × 0.3– 0.7 cm, drying red-brown, spreading, glabrous on both sides, the margins hardened. Panicles terminal, partly or fully exserted, 3–10 cm long, ovate, the branches wiry, opening at right angles to the main axis, glabrous. Spikelets elliptic, apically obtuse, 2.2–2.7(–3.1) 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 as long as the spikelet or a little shorter at maturity, herbaceous, 3–5-veined, glabrous. Lower floret male, with palea. Lower lemma herbaceous, 5-veined, glabrous. Upper lemma, smooth, shiny, pale.

Distribution and ecology. – Endemic to the high plateau of central and southern Madagascar, 750–2300 m ( Fig. 2A View Fig ). Exposed ericoid vegetation and rocks, frequently seen climbing in the understory of Erica spp.  

Notes. – Common species recognised by its long prostrate stems, panicle branches at right angles, and small whitish spikelets.

Populations with longer spikelets have been recorded near Lake Alaotra and these could potentially represent a different species.

The lectotype collection has been chosen due to its broadest distribution of duplicates.

1586 (P [P02251509]). Prov. Fianarantsoa: Andringitra, near Peak Boby , 22°11'44"S 46°54'01"E, 25. XI.2009, Couch et al. 588 ( K [ K000805444]) GoogleMaps   ; Ambositra , 15. XI.1938, Decary 13501 ( P [ P02251350])   ; Andringitra , 1934, Heim s.n. ( P [ P00224758])   ; ibid. loco, Homolle 1219 ( P [ P02373634])   ; pic d’Ivohibe , 5. XI.1924, Humbert   3312 ( G, K [ K000805445], P [ P00224762])   ; Andringitra , 27. XI.1924, Humbert   3794 ( G, K [ K000805449], P [ P00224761], TAN)   ; ibid. loco, Perrier de la Bâthie 73, ( K [ K000805489])   ; ibid. loco, Perrier de la Bâthie 11167 ( P [ P00224753])   ; ibid. loco, Perrier de la Bâthie 14550 ( K [ K000244686], P [ P02251327], TAN)   ; Isalo , Perrier de la Bâthie 16568 ( G, P [ P02251519])   ; Andringitra, near Namoly gate, 22°07'52"S 46°53'32"E, 25.X.2011, Vorontsova et al. 591 ( K, TAN) GoogleMaps   ; Andringitra , 100 m before camp 2, 22°09'09"S 46°53'57"E, 27. XI.2013, Vorontsova et al. 1204 ( K, TAN) GoogleMaps   ; Andringitra , path above camp 3, 22°11'11"S 46°54'03"E, 13.XII.2013, Vorontsova et al. 1243 ( K, TAN) GoogleMaps   ; ibid. loco, 13.XII.2013, Vorontsova et al. 1247 ( TAN) GoogleMaps   ; Isalo, Namaza Riv. , 22°32'20"S 45°22'43"E, 16.XII.2013, Vorontsova et al. 1292 ( TAN) GoogleMaps   . Prov. Mahajanga: Tsitondroina , 15. V.1941, Boiteau 4729 ( P [ P02251513])   . Prov. Toliara: Papanga , 3. XI.1928, Humbert   6408 ( K [ K000805450], P [ P02251326])   ; Itrafanaomby , Humbert   13513 ( P [ P02251510])   ; Andohahela , I.1974, Morat 4378 ( TAN)   .

Additional material examined. – MADAGASCAR. Prov. Antananarivo: Tampoketsa d’Ankazobe, X.1962, Bosser 16555 ( P [ P02307350], TAN)   ; PK 44 View Materials rte de Majunga, III.1963, Bosser 17928 ( P [ P02325448])   ; Angavokely, I.1971, Morat 3753 ( TAN)   ; crête des Varavata, 25. XI.1912, Viguier & Humbert    

[Vorontsova et al. 1204, K] [Drawing: Lucy T. Smith]

TAN

Parc de Tsimbazaza

K

Royal Botanic Gardens

P

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

G

Conservatoire et Jardin botaniques de la Ville de Genève

V

Royal British Columbia Museum - Herbarium

I

"Alexandru Ioan Cuza" University

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Panicum

Loc

Panicum andringitrense A. Camus

Vorontsova, Maria S. 2018
2018
Loc

Panicum andringitrense

A. Camus 1925: 369
1925