Viola hallii is a species of violet known by the common names Oregon violet and Hall's violet. It is native to southwestern Oregon and northwestern California...

Dörfl. Viola hallii A.Gray – Oregon violet Viola hamiltoniana D.Don Viola hancockii W.Becker Viola hastata Michx. - halberd-leaf yellow violet Viola × haynaldii...

Toxicoscordion venenosum, Plectritis congesta, Phacelia capitata, and Viola hallii. Threats to this plant include fire suppression, which prevents a natural...

Santiria rubiginosa var. latipetiolata Aesculus wangii Species Achyrocline hallii Acmella leucantha Adenostemma harlingii Adenostemma zakii Aequatorium jamesonii...

plants Salvia azurea Blue sage threatened threatened plants Schoenoplectus hallii Hall's bulrush threatened threatened plants Solidago sciaphila Cliff goldenrod...

tamarisk Tamarix tetrandra Viola lanceolata Viola macloskeyi Viola maroccana Viola nephrophylla Viola obliqua Viola palustris Viola renifolia Subspecies Adenia...

Mexican alvaradoa (Alvaradoa amorphoides) Hall's shrubby-spurge (Tetracoccus hallii) red shrubby-spurge (Tetracoccus dioicus) Apache pine (Pinus engelmannii)...

are seven bryophyte species evaluated as data deficient. Drepanocladus hallii Drepanocladus sparsus Isopterygium strangulatum Riella alatospora Riella...