Hannah Caroline Aase

Allium speculae, the Little River Canyon onion, is a plant species native to the US States of Georgia and Alabama, especially in the vicinity of the Little River Canyon National Preserve in northeastern Alabama. It occurs on sandy and rocky soils in the Piedmont region at elevations of about 300 m. Allium speculae produces egg-shaped bulbs up to 5 cm long. This species does not have rhizomes. Scapes are round in cross-section, up to 30 cm tall. Flowers bell-shaped, up to 6 mm across; tepals pink; anthers and pollen pale yellow; ovary crested.

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Allium abramsii is a species of wild onion known by the common name Abrams' onion.

Allium tuolumnense is a rare species of wild onion, known by the common name Rawhide Hill onion. It is endemic to Tuolumne County, California, where it is known only from a small section of the Sierra Nevada foothills at Rawhide Hill and the Red Hills. It is a plant of serpentine soils.

Allium munzii, also known by its common name, Munz's onion, is a bulb forming perennial herb endemic to Western Riverside County, California. This flower is characterized by its umbrella-like shape and flower clusters. Allium munzii is listed as endangered under the Endangered Species Act as of 1998. There are thirteen known populations in existence, and the latest population count stands at 20,000-70,000 individuals, counted in 1998. Major threats to this flower include urbanization, agriculture, clay mining, and other human activities. A recovery plan for Allium munzii is not in motion but

Allium jepsonii is a species of wild onion known by the common name Jepson's onion, honoring renowned California botanist Willis Linn Jepson.

Allium diabolense (serpentine onion or devil's onion) is a species of wild onion endemic to central California in the Coast Ranges and the Transverse Ranges. It grows on serpentine soils at elevations of 500 to 1500 m, from Kern and Ventura Counties north to Stanislaus and Santa Clara Counties. Allium diabolense grows from a reddish-brown bulb just over a centimeter long. It produces a stem up to 20 centimeters tall and a single leaf, which is longer than the stem. The inflorescence contains up to 50 dark-veined, pink-tinted white flowers. Its anthers and pollen are yellow.

Allium sharsmithiae, called the Mount Hamilton onion or Helen Sharsmith's onion, is a rare species of wild onion endemic to a small region in California. It is found on serpentine soils in the vicinity of Mount Hamilton, in the Diablo Range south of San Francisco Bay in Santa Clara, Alameda and Stanislaus Counties.

Allium denticulatum is a species of wild onion known by the common name toothed wild onion. It is endemic to southern California, where it grows in the western Mojave Desert, the adjacent Tehachapi Mountains, the southern Sierra Nevada, and the Palomar Mountains. It is reported from Kern, San Bernardino, Riverside, Ventura, San Diego Counties.

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