Al Schneider's Rocky Mountains Plant Descriptions

Slender Yellow Woodsorrel
Oxalis dillenii
Oxalis family (Oxalidaceae)

This tiny Oxalis is found infrequently in Colorado foothills. It is quite common, though, in the mid-western and eastern United States. Stems and have hairs; leaves are smooth and shiny. Leaves are distinctly . Stems are low and branched from the base without underground . Both stems and have straight or curved hairs. Greek "oxys," meaning "sharp," was given for the sharp, sour, taste of the plant. In 1732 the plant was first documented in a drawing by botanical illustrator, J. Dillenius, and the plant was named by Nicolaus Jacquin in 1794.


©2022 ktsubak

Description

from fibrous roots, caulescent, not rooting at the , with sour juice (oxalic acid). Stems mainly 4-12" long, erect or eventually reclining, hairy. to about 1" long. Flowers 2-7 in clusters. 5, petals 5, yellow from 1/5 to 2/5" long. a .

Field Marks

Shamrock leaves and lovely light yellow flowers.

© Al Schneider

node -- The point at which there is attached growth, as in the place where each leaf is attached.

Axillary bud growing from the armpit of the plant.

A perennial plant lives and blooms for many years.

A herb is a plant whose stems die back to the ground in the winter.

Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom.

glaucous -- Pale gray or bluish-green. It can mean covered with a greyish, bluish or whitish coating.

capsule -- a type of simple, dry fruit produced by many species of flowering plants. In most cases the capsule splits apart to release seeds.

fruit -- any seed-bearing structure in flowering plants. It is formed from the ovary after flowering.

obcordate -- Heart-shaped, with the stem attaching to the tapering point.

petiole -- the stalk of a leaf.

leaflets -- Each little leaf-like thing in a compound leaf is a leaflet.

rhizome -- root-like stems that may either grow horizontally at the soil surface or in other orientations underground.