William Henry Brewer

Rhus integrifolia, also known as lemonade sumac, lemonade berry, or lemonadeberry, is a shrub to small tree in the sumac genus Rhus. It is native to the Transverse and Peninsular Ranges and the South Coast regions of Southern California. This extends from Santa Barbara County and the Channel Islands to San Diego County and extending into north-central Pacific coastal Baja California and its offshore islands such as Cedros Island. It is 1–8 metres (3.3–26.2 ft) in height, with a sprawling form, and is a member of the chaparral plant community often found in canyons and on north-facing slopes

Astragalus austiniae is a species of milkvetch known by the common name Austin's milkvetch. It is native to the Sierra Nevada of California and Nevada in the vicinity of Lake Tahoe. It is a plant of the alpine climate of the high mountains, where it tolerates exposed areas.

Polygonum bolanderi is an uncommon California species of flowering plant in the buckwheat family known by the common name Bolander's knotweed.

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Lathyrus sulphureus is a species of wild pea known by the common names snub pea and sulphur pea. It is native to the mountains of northern California and Oregon, where it grows in forest and woodland.

Trifolium beckwithii is a species of clover known by the common name Beckwith's clover.

Chamaebatiaria is a monotypic genus of aromatic shrub in the rose family containing the single species Chamaebatiaria millefolium, which is known by the common names fern bush and desert sweet. Its genus name comes from its physical resemblance to the mountain miseries of genus Chamaebatia, which are not closely related. This is a hairy, sticky plant covered in fernlike foliage made up of fronds of small leaflets. At the ends of the erect branches of this spreading bush are inflorescences of white roselike flowers. This shrub is a resident of scrub, woodland, and forests in western North

Polygonum shastense is a species of flowering plant in the knotweed family known by the common name Shasta knotweed. It is native to sections of southwestern Oregon, northwestern Nevada, and northern and central California, where it grows in rocky and gravelly mountainous habitat up to 3300 meters (11,000 feet) elevation. It is most common in the Sierra Nevada. The species name refers to its occurrence on Mount Shasta in Shasta County, California.

Koenigia davisiae is a flowering plant in the knotweed family that is known by the common names Davis' knotweed or Newberry knotweed.