Cyathopus Stapf
Referring to cupular pedicel tips.
Habit, vegetative morphology. Perennial. Culms 90–140 cm high; herbaceous. Leaves non-auriculate. Leaf blades narrow; flat; not pseudopetiolate; without cross venation; an unfringed membrane; not truncate.
Reproductive organization. Plants bisexual, with bisexual spikelets; with hermaphrodite florets. The spikelets all alike in sexuality.
Inflorescence. Inflorescence paniculate (many spikeleted); open (large); with capillary branchlets; espatheate; not comprising ‘partial inflorescences’ and foliar organs. Spikelet-bearing axes persistent. Spikelets solitary; pedicellate. Pedicel apices minutely cupuliform.
Female-fertile spikelets. Spikelets about 3 mm long; compressed laterally to not noticeably compressed; falling with the glumes. Rachilla terminated by a female-fertile floret.
Glumes present; two; more or less equal; long relative to the adjacent lemmas (slightly exceeding them); hairy; without conspicuous tufts or rows of hairs; pointed; awnless (but caudate); non-carinate (dorsally rounded); similar (chartaceous, each with a small apical beak). Lower glume strongly 3 nerved. Upper glume strongly 3 nerved. Spikelets with female-fertile florets only; without proximal incomplete florets.
Female-fertile florets 1. Lemmas ovate; less firm than the glumes (scarious); not becoming indurated; entire; pointed to blunt; awnless (muticous); hairless; carinate (weakly), or non-carinate (dorsally rounded); 5 nerved (the nerves obscure towards the apex). Palea present; relatively long; entire (pointed); awnless, without apical setae; not indurated (hyaline); 2-nerved; 2-keeled. Palea keels wingless. Lodicules present; 2; free; apparently not cuneate; glabrous; not toothed. Stamens 3. Anthers not penicillate; without an apically prolonged connective. Ovary glabrous. Stigmas 2.
Fruit, embryo and seedling. Fruit small (about 2 mm long). Hilum short. Embryo large.
Taxonomy. Pooideae (? - not reliably classifiable without better data); Poodae (?); Aveneae (?).
Distribution, ecology, phytogeography. 1 species; Eastern Himalayas. Mesophytic; shade species; glycophytic. In woods.
Holarctic. Boreal. Eastern Asian.
References, etc. Morphological/taxonomic: Stapf 1895.
Special comments. Fruit data wanting. Anatomical data wanting.
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).