Flora of North America species comparison

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Arabis caucasica

garden rockcress, mountain rockcress, rock cress
Habit Perennials; (stoloniferous, with vegetative rosettes, loosely cespitose to somewhat pulvinate); sparsely to moderately pubescent, trichomes stalked, cruciform, stellate, mixed with simple and forked-stalked ones.
Stems

several to many from base, erect, ascending to decumbent, branched (several), 1.5–3.5(–5) dm.
Basal leaves

petiole 0–1 cm;

blade spatulate, oblanceolate, oblong, or obovate, 2–5.5(–8) cm × 9–18(–25) mm, margins dentate to denticulate, apex obtuse or acute, surfaces usually pubescent, rarely subglabrate, trichomes stellate with some rays branched.
Cauline leaves

4–8;

blade oblong or ovate, 1–5 cm × 5–20 mm, base subcordate or auriculate, margins usually dentate, rarely subentire, apex acute or obtuse.
Racemes

simple, (lax).
Flowers

sepals oblong, 4.5–8 × 1–2 mm, lateral pair conspicuously saccate basally;

petals white, spatulate to obovate, 10–19 × 4–8 mm, apex obtuse;

filaments 4–7 mm;

anthers oblong, 0.7–1.2 mm.
Fruiting pedicels

ascending to divaricate, 7–17(–20) mm.
Fruits

ascending to spreading, torulose, (3–)4–7 cm × 1–2 mm;

valves each with midvein absent or obscure, along proximal 1/2;

ovules 40–60 per ovary;

style 0.5–1 mm.
Seeds

narrowly winged throughout, ovate, 1–1.4 × 0.9–1.1 mm;

wing 0.1–0.2 mm wide.
2n

= 16.

Arabis caucasica
Phenology Flowering Jun–Aug.
Habitat Rare garden escape
Distribution
from FNA
MI; NY; BC; NB; ON; QC; YT; sw Asia [Introduced in North America]
[BONAP county map]
Source FNA vol. 7, p. 259.
Parent taxa Brassicaceae > tribe Arabideae > Arabis
Sibling taxa
A. aculeolata, A. alpina, A. blepharophylla, A. crucisetosa, A. eschscholtziana, A. furcata, A. georgiana, A. mcdonaldiana, A. modesta, A. nuttallii, A. olympica, A. oregana, A. patens, A. pycnocarpa
Name authority Willdenow: Enum. Pl., suppl., 45. (1814)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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