Lasthenia coronaria (Nutt.) Ornduff

Pappus, head size, and branching pattern vary in Lasthenia coronaria. Two types of pappi are often found within a head and sometimes in different individuals of a population. The most distinctive feature of this species is its glandular herbage, which produces a characteristic sweet scent not present in any other lasthenia.

Annuals, to 40 cm (herbage sweetly scented). Stems erect, branched distally, usually glandular-puberulent (often with longer non-glandular hairs as well). Leaves linear, 15–60 × 0.5–5 mm, (not fleshy) margins entire or 1–2-pinnately lobed, faces hairy. Involucres hemispheric to obconic, 4–7 mm. Phyllaries 6–14, lanceolate to ovate, hairy. Receptacles conic, smooth, muricate, or pitted, hairy. Ray florets 6–15; (corollas yellow) laminae linear-oblong or oblong, 3–10 mm. Anther appendages elliptic, acute (style apices ± deltate with apical tufts of hairs and subapical fringes of shorter hairs). Cypselae black, linear to narrowly clavate, to 2.5 mm, hairy; pappi usually of 5–6+ lanceolate to ovate scales (1–5 uniaristate), sometimes of 4–5 subulate, aristate scales, or 0. 2n = 8, 10.

Ptilomeris coronaria Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 382. 1841; Baeria californica (Hooker) K. L. Chambers; B. coronaria (Nuttall) A. Gray

Baeria aristata (Nutt.) Coville, Proc. Biol. Soc. Wash. 13: 121
1899.
Plilomeris aristata Nutt. Trans. Am. Phil. Soc. II. 7: 382. 1841. Ptilomeris coronaria Nutt. Trans. Am. Phil. Soc. II. 7: 382. 1841. Ptilomeris mutica Nutt. Trans. Am. Phil. Soc. II. 7: 382. 1841. Plilomeris antliemoides Nutt. Trans. Am. Phil. Soc. II. 7: 382. 1841. Hymenoxys californica Hook. Bot. Mag. pi. 3828. 1841. Hyinenoxys californica coronaria T. & G. Fl. N. Am. 2: 380. 1842. Hymenoxys mutica T. & G. Fl. N. Am. 2: 381. 1842. Hymenoxys calva T. & G. Fl. N. Am. 2: 381. 1842. Plilomeris tenella Nutt. VrocVhildi. Acad. '^: 20. 1848. Ptilomeris affmis Nutt. Proc. Phila. Acad. 4: 20. 1848. Actinolepis coronaria A. Gray, Proc. Am. Acad. 9: 197. 1874. Actinolepis anthemoides A. Gray, Proc. Am. Acad. 9: 197. 1874. Actinolepis mutica A. Gray, Proc. Am. Acad. 9: 198. 1874. Actinolepis tenella A. Gray, Proc. Am. Acad. 9: 198. 1874. Baeria affinis A. Gray, Proc. Am. Acad. 19: 23. 1883.
Baeria lenella A. Gray, Proc. Am. Acad. 19: 23. 1883.
Baeria coronaria A. Gray, Proc. Am. Acad. 19: 23. 1883.
Baeria mutica A. Gray, Proc. Am. Acad. 19: 23. 1883.
Baeria anlhemoides A. Gray, Syn. Fl. N. Am. 1^: 328. 1884.
Baeria Parishii S. Wats. Proc. Am. Acad. 24: 83. 1889.
Baeria arislaia mutica H. M. Hall, Univ. Calif. Publ. Bot. 3: 173. 1907.
Baeria aristata anlhemoides H. M. Hall, Univ. Calif. Publ. Bot. 3: 174. 1907.
Baeria arislaia affinis H. M. Hall, Univ. Calif. Publ. Bot. 3: 174. 1907.
Baeria arislaia Parishii H. M. Hall, Univ. Calif. Publ. Bot. 3: 175. 1907.
Annual, simple to diffusely much branched, erect, 0.5-3 dm. high, minutely glandularpubescent throughout and often also loosely villous especially towards the heads; leaves mostly once or twice pinnately parted into linear-filiform divisions, rarely all entire on small plants; peduncles 1-10 cm. long, exceeding the upper leaves; involucre hemispheric, 3-5 mm. high; bracts 8-12, ovate, acute, with prominent midrib, at length deciduous with their achenes; receptacle acutely conic, usually scrobiculate but varying to muriculate, either glabrous or hirsute; ray-flowers 8-13, the oblong ligules 3-10 mm. long; disk-corollas about 2 mm. long, the tube glandular; achenes about 2 mm. long, slightly compressed, each face with 1 or 2 nerves, scabrous; squamellae 6-12, some or all of them tapering into awns, or all truncate and erose and then either awned or awnless, or the pappus entirely wanting.
Type locality: Near San Diego, California.
Distribution: Southern California and Lower California; and (as a waif?) in Sacramento County, California.

Lasthenia coronaria is a species of flowering plant in the family Asteraceae known by the common name royal goldfields. It is native to California and Baja California, including Guadalupe Island.

Lasthenia coronaria là một loài thực vật có hoa trong họ Cúc. Loài này được (Nutt.) Ornduff mô tả khoa học đầu tiên năm 1966.