Juncaginaceae

Richard
Common names: Arrow-grass Family
Treatment appears in FNA Volume 22. Treatment on page 43.

Herbs, perennial or annual, rhizomatous, evident stems absent; turions absent. Leaves basal, emersed, sessile; sheath persisting longer than blade, not leaving circular scar when shed, ligulate, auriculate with scarious lobes; blade linear; intravaginal squamules scales, more than 2. Inflorescences terminal or axillary, scapose spikes, spikelike racemes, rarely solitary flowers, without spathe, pedunculate; peduncle following fertilization not elongating, not spiraling. Flowers bisexual or unisexual, staminate and pistillate on same plant; subtending bracts absent; perianth present, rarely absent; tepals 1, or 6 in 1–2 series. Bisexual and staminate flowers: stamens 1, 4, or 6, epitepalous, when 4 or 6, then in 2–3 series; anthers distinct, dehiscing longitudinally; pollen globose. Pistillate and bisexual flowers: pistils 1, 3, or 6, not stipitate, when 3 or 6, coherent or weakly connate; ovules basal, anatropous. Fruits nutlets or schizocarps. Seeds 1; embryo straight.

Discussion

Genera 4, species ca. 15 (2 genera, 5 species in the flora).

Lower Taxa

Key

1 Inflorescences both scapose spikelike racemes with bisexual and unisexual flowers and sessile with pistillate flowers; pistils 1 Lilaea
1 Inflorescences all scapose spikelike racemes with bisexual flowers; fertile pistils 3 or 6 Triglochin

"not elongating" is not a number.

... more about "Juncaginaceae"
Robert R. Haynes +  and C. Barre Hellquist +
Richard +
Arrow-grass Family +
Nearly worldwide +
pistillate +, staminate +  and pedunculate +
bisexual +  and unisexual +
axillary +  and terminal +
scarious +
not spiraling +
not stipitate +
6 +, 3 +  and 1 +
spikelike +
dahlgren1985a +, haynes1985a +, larsen1966a +, reveal1977b +, thieret1988a +  and thorne1993b +
auriculate +
persisting +
epitepalous +
6 +, 4 +  and 1 +
Juncaginaceae +
6 +  and 1 +
annual +  and perennial +