Arabis aculeolata
Waldo rockcress
(c) Nolan Exe, some rights reserved (CC BY), uploaded by Nolan Exe · licence
Family: Brassicaceae · Type: Herb
Conservation status: CNPS 2B.2
Arabis aculeolata (Waldo rockcress) is a California herb in the Brassicaceae family.
I apologize, but I cannot generate a complete description for this plant as there are critical pieces of information missing from the provided data. The plant record lacks essential details like: - Native Status - Bioregional Distributions - Elevation Range - Habitat - Flowering Time - Jepson Description Without these key pieces of information, I cannot construct an accurate 4-5 sentence description following the established rules. To generate a description, I would need the complete botanical data for Waldo rockcress. If you can provide the missing information, I would be happy to help create a description following the detailed guidelines you've outlined.
Identification and appearance
Key characters: Differentiators are not available at this time.
Conservation status
CNPS 2B.2
How to tell it apart
vs Boechera: Arabis pods are narrower (under 2mm vs 2mm+) and consistently straight; Boechera pods are often curved.; vs Matthiola: Arabis has stalked star-shaped hairs and erect narrow pods; Matthiola has soft unbranched hairs and stouter pods.; vs Raphanus: Arabis has tiny star-shaped hairs and thin erect pods; Raphanus has larger flowers and thick beaded pods.; vs Pelargonium: Arabis has four petals and narrow upright pods; Pelargonium has five petals and beak-like fruits.; vs Phlox: Arabis has four separate petals and seed pods; Phlox has fused tubular flowers and capsules.
Frequently asked questions
What plant family does Arabis aculeolata belong to?
Arabis aculeolata is in the Brassicaceae family, genus Arabis.
Is Arabis aculeolata rare or endangered?
Arabis aculeolata carries California Rare Plant Rank 2B.2, state rank S2.
Related species
Other California species in the same genus, family, or bioregion.
Sources: CDFW CNDDB
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.