Key to Rorippa
View taxon page for Rorippa
(For a list of species in Rorippa, use the above link.)
Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.
1. Cauline 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).
bases not lobed or clasping
..... R. tenerrima 1' At least some
cauline leaf bases lobed or clasping
2' Inflorescence elongated, not umbel-like in fruit; sepals generally
deciduous 3. Plants
papillate Pertaining to a surface (e.g., of a leaf, stigma, fruit) bearing small, rounded or conic protuberances (papillae).
;
hairs hemispheric, sac-like
..... R. sinuata 3' Plants not papillate;
glabrous or hairs
cylindric Elongate, with parallel sides and, at any point, round in transverse section.
4' Fruit valves glabrous; sepals deciduous
5. Fruit ±
spheric, 1.2–3 mm
6. Perennial herb;
pedicel Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit.
4–15 mm;
petals 3–5 mm;
style 1–1.5(2) mm
..... R. austriaca 5' Fruit not spheric, (2)4–18 mm
7. Stem erect Upright; vertically oriented.
, unbranched at base; petals (1.5)1.8–2.5(3) mm
..... R. palustris 7' Stem erect,
prostrate Lying flat on the ground.
to
decumbent lying mostly flat on the ground but with tips curving up.
, or
ascending Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment.
, branches generally few to several from base; petals 0.5–1.8(2) mm
9' Fruit
linear Elongate, with nearly parallel sides; narrower than elliptic or oblong.
to
oblong Longer than wide, with nearly parallel sides; wider than linear.
; petals
spreading Oriented more or less perpendicularly to the axis of attachment; often, more or less horizontal.
..... R. curvisiliqua
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