|
|
Key to SetariaView taxon page for Setaria
(For a list of species in Setaria, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Bristles at base of spikelets  1. In Poaceae, one or more florets (each a flower with subtending lemma and generally palea) and generally 2 subtending glumes; in a sterile spikelet, the flower(s) and sometimes palea(s) are rudimentary or absent. 2. In Cyperaceae, the smallest aggregation of flowers (generally more than 2) and associated bracts. with short stiff hairs pointed toward base 2. Leaf sheath  A surrounding or partially surrounding, often tubular structure or part of a structure, such as a leaf base in Apiaceae or Poaceae. margins glabrous; leaf  Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). blade  Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. sparsely hairy abaxially ..... S. adhaerens 2' Leaf sheath margins ciliate  Having generally straight, conspicuous hairs along margins or edges. ; leaf blade scabrous abaxially ..... S. verticillata 1' Bristles at base of spikelets with short stiff hairs pointed toward tip 3. Upper glume  In Poaceae, each of generally two sheathing bracts that are the lowermost parts of a spikelet, subtending one or more florets. ± = upper lemma  In Poaceae, the lower, generally larger of two sheathing bracts subtending a flower, generally ensheathing the palea (in a sterile lemma, the associated flower and sometimes palea are rudimentary or absent); with the palea and flower, comprising the floret. ; upper lemma ± smooth, dull or shiny 4. Spikelet ± 2 mm; panicle  1. In flowering plants excluding Asteraceae, Cyperaceae, Poaceae, and some other groups, a branched inflorescence in which the basal or lateral flowers (or some of them) open before the terminal or central flowers on any axis. 2. In Asteraceae, Cyperaceae, Poaceae, and some other groups, a panicle-like inflorescence is one in which at least some of the inflorescence units (e.g., heads in Asteraceae; spikelets in Cyperaceae and Poaceae), instead of individual flowers, are attached (stalked or unstalked) to branches and not directly to the main axis of the inflorescence and in which floral development may or may not proceed as in 1. 3–8 cm; leaf blades 3–12 mm wide ..... S. viridis 3' Upper glume < upper lemma; upper lemma strongly ridged 5. Rhizomes absent; upper glume <= 0.5 × upper lemma; spikelet  1. In Poaceae, one or more florets (each a flower with subtending lemma and generally palea) and generally 2 subtending glumes; in a sterile spikelet, the flower(s) and sometimes palea(s) are rudimentary or absent. 2. In Cyperaceae, the smallest aggregation of flowers (generally more than 2) and associated bracts. generally > 2.8 mm, generally 1.5–2 mm wide ..... S. pumila subsp. pumila 5' Rhizomes present; upper glume > 0.5 × upper lemma; spikelet generally < 2.8 mm, generally <= 1.5 mm wide 6. Panicle < 10 cm, 3–4 mm wide; bristles green or straw-colored; stigma dark brown or purple; base of flowering stems with hard, knot-like swellings ..... S. parviflora 6' Panicle > 10 cm, 4–6 mm wide; bristles generally orange; stigma pale; base of flowering stems not swollen ..... S. sphacelata
Please use this Google Form for Contact/Feedback
Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|
|
|