Oret R palea. A drawn from Beaman 4470 E drawn from deKoninck 134 from Guatemala I drawn from Peterson 11087 et al M drawn from Soreng 3314 Soreng P drawn from Davidse 9771.Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: …distal 1/2 to quarter. Spikelets 4? mm long, XL880 manufacturer broadly lanceolate to lanceolate, laterally compressed, not bulbiferous, pale green, slightly anthocyanic; florets (1?2, hermaphroditic; rachilla internodes to 1 mm long (extension to 1.5 mm), smooth, glabrous; glumes broadly lanceolate to lanceolate, usually somewhat anthocyanic, subequal to equal, slightly shorter than adjacent lemmas, distinctly veined, distinctly keeled, slightly thinner than lemmas, smooth or keel apically slightly scabrous, surfaces obscurely papilliate, apex acute; lower glumes 2.5?.2 mm long, 3-veined; upper glumes 3?.5 mm long, 2 ?to equal lower glumes in width, (3?5(?)-veined; calluses glabrous; lemmas 3? mm long, broadly lanceolate, lower one 5?-veined, upper 5-veined, green with or without anthocyanic flush, distinctly keeled, keel smooth or distally sparsely scabrous, keel and marginal veins AZD-8055 mechanism of action glabrous or thinly and loosely puberulent, between veins glabrous or loosely puberulent in lower 1/3, intermediate veins prominent, margins and apex narrowly scarious hyaline, edges smooth, apices acute, incurved; palea keels smooth or sparsely to moderately scabrous, glabrous, between keels glabrous or sparsely puberulent. Flowers chasmogamous; lodicules 0.75 mm long, broadly lanceolate, apex sharp, with a well developed lateral lobe; anthers 1.6? mm long, sometimes poorly formed. Caryopses 1.8 mm long, elliptical in side-view, round on back, almost cylindrical in cross-section, pale brown, sulcus very shallow, hilum 0.25 mm long, round to oval to elliptical, grain free from the palea. 2n = unknown. Distribution. The species is known only from the Cerro Potos? Nuevo Le . Ecology. The species occurs on open or sparsely wooded slopes derived from calcareous rocks on the upper slopes of Cerro Potos? and is associated with Pinus culminicola Andresen Beaman, Trisetum spicatum (L.) K. Richt., Senecio sp., and Festuca hephaestophila Nees ex Steud., and F. hintoniana E.B. Alexeev; between 3650-3800 m. Flowering July to August. Conservation status. This narrow endemic is locally uncommon. Specimens examined. Mexico. Nuevo Le : Cerro Potos? ca. 20 mi NE of Galeana, ascent of Sierra Potosi by the north hogback, 26 Jul 1934, C.H.Mueller 1248 M.T.Mueller (GH, MEXU, TEX); ditto, summit, ca. 3650 m, 1 Jul 1959, J.H.Beaman 2643 (GH, MSC, TEX, US). at NE summit of mountain, ca. 3650 m, 13 Sep 1960, J.H.Beaman 4470 (GH, MSC, TEX, US); ditto, 25 Mar 1962, A.A.Beetle M-475 P.Rojas-M. (WYAC); ditto, 20?2’23″N, 100?3’48″W, 3650 m, 15 Aug 1998, Ing.M.Castillo-B. 345 Ing.J.Garza-C. (MEXU MEXU p.p. “b”, p.p. “a” is Poa pratensis subsp. alpigena fide RJS on both sheets); ditto, near summit, 3674 m, 21 Oct 2007, P.M.Peterson 21459, J.M.Saarela, D.Stancik (US; DNA voucher, unpublished); ditto, just below summit, 26 Jul 1985, S.Ginzbarg 217, A.Whittemore A.McDonald (TEX). Municipio Galeana, 3800 m, 21 Aug 1969, G.B.Hinton 17253 et al. (TEX); ditto, Cima del Cerro Potos? 3670 m, 3 Aug 1988, A.Garcia 70 (MEXU). 3660 m, 15 Aug 1989, A.Garcia 163, S.Gonzales M.Gonzalez (MEXU). Discussion. Poa mulleri is an odd species perhaps related to P. orizabensis, but the characters are quite unusual, and it deserves a subsection of its own. Papillae on long c.Oret R palea. A drawn from Beaman 4470 E drawn from deKoninck 134 from Guatemala I drawn from Peterson 11087 et al M drawn from Soreng 3314 Soreng P drawn from Davidse 9771.Revision of Poa L. (Poaceae, Pooideae, Poeae, Poinae) in Mexico: …distal 1/2 to quarter. Spikelets 4? mm long, broadly lanceolate to lanceolate, laterally compressed, not bulbiferous, pale green, slightly anthocyanic; florets (1?2, hermaphroditic; rachilla internodes to 1 mm long (extension to 1.5 mm), smooth, glabrous; glumes broadly lanceolate to lanceolate, usually somewhat anthocyanic, subequal to equal, slightly shorter than adjacent lemmas, distinctly veined, distinctly keeled, slightly thinner than lemmas, smooth or keel apically slightly scabrous, surfaces obscurely papilliate, apex acute; lower glumes 2.5?.2 mm long, 3-veined; upper glumes 3?.5 mm long, 2 ?to equal lower glumes in width, (3?5(?)-veined; calluses glabrous; lemmas 3? mm long, broadly lanceolate, lower one 5?-veined, upper 5-veined, green with or without anthocyanic flush, distinctly keeled, keel smooth or distally sparsely scabrous, keel and marginal veins glabrous or thinly and loosely puberulent, between veins glabrous or loosely puberulent in lower 1/3, intermediate veins prominent, margins and apex narrowly scarious hyaline, edges smooth, apices acute, incurved; palea keels smooth or sparsely to moderately scabrous, glabrous, between keels glabrous or sparsely puberulent. Flowers chasmogamous; lodicules 0.75 mm long, broadly lanceolate, apex sharp, with a well developed lateral lobe; anthers 1.6? mm long, sometimes poorly formed. Caryopses 1.8 mm long, elliptical in side-view, round on back, almost cylindrical in cross-section, pale brown, sulcus very shallow, hilum 0.25 mm long, round to oval to elliptical, grain free from the palea. 2n = unknown. Distribution. The species is known only from the Cerro Potos? Nuevo Le . Ecology. The species occurs on open or sparsely wooded slopes derived from calcareous rocks on the upper slopes of Cerro Potos? and is associated with Pinus culminicola Andresen Beaman, Trisetum spicatum (L.) K. Richt., Senecio sp., and Festuca hephaestophila Nees ex Steud., and F. hintoniana E.B. Alexeev; between 3650-3800 m. Flowering July to August. Conservation status. This narrow endemic is locally uncommon. Specimens examined. Mexico. Nuevo Le : Cerro Potos? ca. 20 mi NE of Galeana, ascent of Sierra Potosi by the north hogback, 26 Jul 1934, C.H.Mueller 1248 M.T.Mueller (GH, MEXU, TEX); ditto, summit, ca. 3650 m, 1 Jul 1959, J.H.Beaman 2643 (GH, MSC, TEX, US). at NE summit of mountain, ca. 3650 m, 13 Sep 1960, J.H.Beaman 4470 (GH, MSC, TEX, US); ditto, 25 Mar 1962, A.A.Beetle M-475 P.Rojas-M. (WYAC); ditto, 20?2’23″N, 100?3’48″W, 3650 m, 15 Aug 1998, Ing.M.Castillo-B. 345 Ing.J.Garza-C. (MEXU MEXU p.p. “b”, p.p. “a” is Poa pratensis subsp. alpigena fide RJS on both sheets); ditto, near summit, 3674 m, 21 Oct 2007, P.M.Peterson 21459, J.M.Saarela, D.Stancik (US; DNA voucher, unpublished); ditto, just below summit, 26 Jul 1985, S.Ginzbarg 217, A.Whittemore A.McDonald (TEX). Municipio Galeana, 3800 m, 21 Aug 1969, G.B.Hinton 17253 et al. (TEX); ditto, Cima del Cerro Potos? 3670 m, 3 Aug 1988, A.Garcia 70 (MEXU). 3660 m, 15 Aug 1989, A.Garcia 163, S.Gonzales M.Gonzalez (MEXU). Discussion. Poa mulleri is an odd species perhaps related to P. orizabensis, but the characters are quite unusual, and it deserves a subsection of its own. Papillae on long c.
