Vulpia C. Gmelin
After J.S.Vulpius (1760–1840), a German chemist.
Including Chloammia Rafin., Distomomischus Dulac, Festucaria Link, Loretia Duval-Jouve, Mygalurus Link, Narduretia Villar, Nardurus (Bluff, Nees & Schauer) Reichenb., Prosphysis Dulac, Zerna Panzer
Excluding Ctenopsis
Habit, vegetative morphology. Annual, or perennial (rarely); caespitose. Culms 5–90 cm high; herbaceous; unbranched above. Culm nodes glabrous. Culm internodes solid, or hollow. Young shoots intravaginal. Leaves not basally aggregated; non-auriculate. Leaf blades linear; narrow; 0.5–3 mm wide; setaceous to not setaceous; flat, or rolled (convolute when dry); without cross venation; persistent; rolled in bud; an unfringed membrane; truncate, or not truncate; 0.2–6 mm long.
Reproductive organization. Plants bisexual, with bisexual spikelets; with hermaphrodite florets; inbreeding; exposed-cleistogamous, or chasmogamous.
Inflorescence. Inflorescence a single raceme (rarely), or paniculate; open, or contracted; when contracted spicate, or more or less irregular. Primary inflorescence branches borne biseriately on one side of the main axis. Inflorescence espatheate; not comprising ‘partial inflorescences’ and foliar organs. Spikelet-bearing axes persistent. Spikelets usually more or less secund; pedicellate.
Female-fertile spikelets. Spikelets 5–16 mm long; compressed laterally; disarticulating above the glumes (also, sometimes, at the base of the pedicel); disarticulating between the florets. Rachilla prolonged beyond the uppermost female-fertile floret; hairy, or hairless; the rachilla extension with incomplete florets. Hairy callus absent. Callus short.
Glumes two; very unequal; shorter than the spikelets; shorter than the adjacent lemmas, or long relative to the adjacent lemmas; free; dorsiventral to the rachis; pointed; awned (G2, sometimes), or awnless; non-carinate; very dissimilar (usually, the G1 often minute, the G2 acute to acuminate). Lower glume 0 nerved, or 1 nerved. Upper glume 1 nerved, or 3 nerved. Spikelets with incomplete florets. The incomplete florets distal to the female-fertile florets. Spikelets without proximal incomplete florets.
Female-fertile florets 2–15 (rarely only 1). Lemmas tapered; similar in texture to the glumes to decidedly firmer than the glumes (chartaceous, with thin margins); not becoming indurated; entire; pointed; awned. Awns 1; median; apical; non-geniculate; much shorter than the body of the lemma to much longer than the body of the lemma; entered by one vein. Lemmas hairy, or hairless; carinate to non-carinate; 3–5 nerved. Palea present; relatively long; apically notched; awnless, without apical setae; not indurated; 2-nerved; 2-keeled. Lodicules present; 2; free; membranous; glabrous; toothed, or not toothed. Stamens 1–2 (rarely 3). Anthers 0.3–5 mm long; not penicillate. Ovary glabrous, or hairy. Styles free to their bases. Stigmas 2.
Fruit, embryo and seedling. Fruit adhering to lemma and/or palea; small, or medium sized, or large; longitudinally grooved; compressed dorsiventrally; with hairs confined to a terminal tuft. Hilum long-linear. Embryo small; not waisted. Endosperm hard; with lipid; containing compound starch grains. Embryo with an epiblast; without a scutellar tail; with a negligible mesocotyl internode.
Seedling with a tight coleoptile. First seedling leaf with a well-developed lamina. The lamina narrow; erect; 1–3 veined.
Abaxial leaf blade epidermis. Costal/intercostal zonation conspicuous. Papillae absent. Long-cells similar in shape costally and intercostally. Mid-intercostal long-cells rectangular, or fusiform; having markedly sinuous walls. Microhairs absent. Stomata absent or very rare, or common; when present, (36–)39–51(–54) microns long. Subsidiaries parallel-sided. Guard-cells overlapped by the interstomatals, or overlapping to flush with the interstomatals. Intercostal short-cells common; in cork/silica-cell pairs (mainly), or not paired (solitary); silicified (when paired). Costal zones with short-cells. Costal short-cells predominantly paired. Costal silica bodies horizontally-elongated crenate/sinuous, or horizontally-elongated smooth (a few), or rounded, or crescentic; not sharp-pointed.
Transverse section of leaf blade, physiology. C3; XyMS+. Mesophyll with non-radiate chlorenchyma; without adaxial palisade. Leaf blade with distinct, prominent adaxial ribs; with the ribs more or less constant in size. Midrib conspicuous; with one bundle only. Bulliforms present in discrete, regular adaxial groups (at the bases of the furrows); in simple fans. All the vascular bundles accompanied by sclerenchyma. Combined sclerenchyma girders absent. Sclerenchyma all associated with vascular bundles.
Phytochemistry. Tissues of the culm bases with little or no starch.
Cytology. Chromosome base number, x = 7. 2n = 14, 28, and 42. 2, 4, and 6 ploid. Chromosomes ‘large’.
Taxonomy. Pooideae; Poodae; Poeae. Rat’s tail fescue.
Distribution, ecology, phytogeography. 23 species; temperate. Commonly adventive. Mesophytic, or xerophytic; species of open habitats; halophytic (sometimes), or glycophytic. Dry places, including coastal sand.
Holarctic, Paleotropical, Neotropical, and Antarctic. Boreal, Tethyan, and Madrean. African. Euro-Siberian, Atlantic North American, and Rocky Mountains. Macaronesian, Mediterranean, and Irano-Turanian. Saharo-Sindian, Sudano-Angolan, and West African Rainforest. Caribbean and Pampas. Patagonian. European. Southern Atlantic North American and Central Grasslands. Sahelo-Sudanian, Somalo-Ethiopian, and South Tropical African.
Hybrids. Intergeneric hybrids with Festuca - ×Festulpia Melderis ex Stace & R. Cotton (several species involved).
Rusts and smuts. Rusts — Puccinia. Taxonomically wide-ranging species: Puccinia graminis, Puccinia coronata, Puccinia brachypodii, Puccinia hordei, Puccinia recondita, ‘Uromyces’ fragilipes, and ‘Uromyces’ dactylidis. Smuts from Tilletiaceae and from Ustilaginaceae. Tilletiaceae — Entyloma and Tilletia. Ustilaginaceae — Ustilago.
Economic importance. Significant weed species: V. bromoides, V. myuros.
References, etc. Morphological/taxonomic: Cotton and Stace 1977, Stace 1981. Leaf anatomical: this project.
Illustrations. • General aspect, spikelet. • General aspect, spikelet. • Spikelet. Vulpia bromoides. • Abaxial epidermis of leaf blade
Cite this publication as: Watson, L., and Dallwitz, M. J. (1992 onwards). ‘Grass Genera of the World: Descriptions, Illustrations, Identification, and Information Retrieval; including Synonyms, Morphology, Anatomy, Physiology, Phytochemistry, Cytology, Classification, Pathogens, World and Local Distribution, and References.’ http://biodiversity.uno.edu/delta/. Version: 18th August 1999. Dallwitz (1980), Dallwitz, Paine and Zurcher (1993 onwards, 1998), and Watson and Dallwitz (1994), and Watson, Dallwitz, and Johnston (1986) should also be cited (see References).
