Key to Triglochin

View taxon page for Triglochin

(For a list of species in Triglochin, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Annual; inflorescence a generally emergent 

spike 

1. In flowering plants excluding Asteraceae, Cyperaceae, Poaceae, and some other groups, an unbranched inflorescence in which the flowers are sessile and nearly always open from the bottom to the top of the inflorescence. 2. In Asteraceae, Cyperaceae, Poaceae, and some other groups, a spike-like inflorescence is one in which the inflorescence units (e.g., heads in Asteraceae; spikelets in Cyperaceae and Poaceae), instead of individual flowers, are sessile and attached directly to the main axis of the inflorescence, not to branches, and in which floral development may or may not proceed as in 1.

of 

bisexual 

Both male and female reproductive parts occurring and functional in the same plant or structure (e.g., flower, spikelet, inflorescence).

and sometimes staminate flowers + 2 submerged, long-styled, 

sessile 

Without a petiole, peduncle, pedicel, or other kind of stalk.

 pistillate flowers enclosed in 

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).

 

sheath 

A surrounding or partially surrounding, often tubular structure or part of a structure, such as a leaf base in Apiaceae or Poaceae.

at base of scape; perianth parts 0 or 1; stamens 0 or 1; carpels 0 or 1, fertile ..... T. scilloides

1' Perennial herb; inflorescence an aerial 

raceme 

In flowering plants excluding Asteraceae, Cyperaceae, Poaceae, and some other groups, an unbranched inflorescence in which the flowers are borne on pedicels and nearly always open from the bottom to the top of the inflorescence. 2. In Asteraceae, Cyperaceae, Poaceae, and some other groups, a raceme-like inflorescence is one in which the inflorescence units (e.g., heads in Asteraceae; spikelets in Cyperaceae and Poaceae), instead of individual flowers, are stalked and attached directly to the main axis of the inflorescence, not to branches, and in which floral development may or may not proceed as in 1.

of bisexual flowers; perianth parts generally 6; stamens 1, 3, 6, occasionally fewer; carpels 6, all or 3 fertile

2. Fertile carpels, mericarps 3

3. Fruit 5–7(9) mm; mericarps weak-ridged abaxially; 

rhizome 

1. In seed plants, stem that is often elongate, more or less horizontal, usually underground; distinguished from roots by bearing of leaves, leaf scars, axillary buds, etc. 2. In ferns, stem that is located underground, embedded in leaf litter, on rocks or in rock crevices, or on trees or tree branches, often scaly or hairy; distinguished from roots by bearing of fronds (roots rarely bear fronds), and their greater diameter.

± stout; plant tufted; c&s SNH, 2100–3450 m ..... T. palustris

3' Fruit 1–1.5 mm; mericarps strong-3-keeled abaxially; rhizome slender; plant mat-forming; NCo, CCo, n SCo, < 30 m ..... T. striata

2' Fertile carpels, mericarps 6

4. Plant dense-tufted, (1)4–11 dm; rhizome stout; 

ligule 

1. In Asteraceae, the 5-lobed, strap- or fan-shaped outer portion of the corolla of a ligulate flower. 2. In most Poaceae and some other grass-like plants, an appendage at the adaxial junction of leaf sheath and blade, generally membranous, sometimes formed of hairs. 3. In Isoetes and, more obscurely, in Selaginella, a membrane that wholly or partially covers a sporangium.

tip 

entire 

Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.).

to ± notched, (1)1.5–5 mm; leaf ± 

elliptic 

In the shape of a flattened circle or ellipse; wider than linear

in ×-section, generally 2–5 mm wide ..... T. maritima

4' Plant loose-tufted to mat-forming, 1–6 dm; rhizome ± slender, often creeping; ligule tip deep-2-lobed, 0.5–1.5 mm; leaf ± round or semicircular in ×-section, generally 1–2 mm wide ..... T. concinna

5. Plant generally 1–3(4.5) dm; inflorescence generally >= leaves; salt marshes; NCo, CCo, SCo ..... var. concinna

5' Plant (1)3–5(6) dm; inflorescence generally >> leaves; alkaline meadows, seeps, mudflats, stream and lake margins; ne KR, n CaRH, s SNH, GB, DMoj ..... var. debilis

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