Key to Elatine
View taxon page for Elatine
(For a list of species in Elatine, use the above link.)
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Sepals,
petals 4;
stamens 8;
pedicels 
Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.
elongating in
fruit to 2–3 × fruit;
seeds curved 90–180°
..... E. californica 1' Sepals 2–3, petals 3; stamens (1) 3, 6; pedicels generally ± 0, occasionally ± elongating in fruit to <= 1/2 fruit; seeds straight or curved <= 30°
2. Flower subsessile to stalked, ±
erect 
Upright; vertically oriented.
; fruit
pedicel Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.
turned to 1 side;
sepals 3, ± equal
..... E. ambigua 2' Flower
sessile 
Without a petiole, peduncle, pedicel, or other kind of stalk.
, erect; fruit pedicel not turned to 1 side; sepals 2, ± equal, or 3, 1 < others
3. Stamens (1) 6 (if 3,
opposite 
1. Arranged in pairs along an axis - e.g., two leaves per node. 2. Occurring in the same rank, directly above or below, as 'stamens opposite petals'. 3. Located directly across from.
petals)
..... E. heterandra 3' Stamens 3,
alternate 
1. Arranged singly, often spirally, along an axis - e.g., one leaf per node. 2. Occurring in different ranks, appearing to be between, not directly above or below, as 'stamens alternate petals'.
petals
4' Seed pits 16–35 per row
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