Deinandra halliana (D. D. Keck) B. G. Baldwin

Deinandra halliana occurs in the Inner South Coast Ranges. Evident population sizes vary greatly from year to year; active plants may be absent in dry years and form dense stands in some wet years. Madia radiata is morphologically similar to D. halliana; the two species sometimes co-occur and can be difficult to distinguish without close examination of phyllaries and cypselae.

Annuals, 15–120 cm. Stems fistulose. Leaves: proximal blades entire or serrate, faces glabrous (margins and midribs sometimes scabrous or hispid). Heads in open, corymbiform, racemiform, or paniculiform arrays. Bracts subtending heads usually not overlapping involucres. Phyllaries evenly stipitate-glandular, including margins and apices, usually with some non-glandular, non-pustule-based hairs as well. Paleae in 1 series. Ray florets (8–)10–14; laminae deep yellow, 5–10 mm. Disc florets 28–60, all functionally staminate; anthers yellow or brownish. Pappi 0 (reportedly sometimes rudimentary). 2n = 20.

Hemizonia halliana D. D. Keck, Madroño 3: 12. 1935

Deinandra halliana, or Hall's tarplant, is a California species of plants in the tribe Madieae within the family Asteraceae. It has been found in the Coast Ranges of Central California, in Monterey, Fresno, San Benito, and San Luis Obispo Counties.

Deinandra halliana is an annual herb up to 120 cm (4 feet) tall. It produces numerous flower heads in an open array, each head containing 8-14 yellow ray florets and as many as 60 disc florets with yellow corollas but yellow or brown anthers.

Deinandra halliana là một loài thực vật có hoa trong họ Cúc. Loài này được (D.D.Keck) B.G.Baldwin mô tả khoa học đầu tiên năm 1999.