in A. P. de Candolle and A. L. L. P. de Candolle, Prodr.6: 74. 1838
Etymology: Greek monos, single, and lopos, husk, alluding to phyllaries
Found in FNA Volume 21. Treatment on page 349. Mentioned on page 335, 336.
Dioecious. Plants 3–14 cm (bases woody). Stolons none. Basal leaves absent at flowering. Cauline leaves linear-lanceolate to cuneate-oblanceolate, 11–35 × 2–6 mm, acute, not flagged (apices acute), faces gray-pubescent. Heads 3–25 in corymbiform to paniculiform arrays. Involucres: staminate 6–8 mm; pistillate 6–8 mm. Phyllaries distally red to pink, light brown, or white. Corollas: staminate 3–4.5 mm; pistillate 5–6 mm. Cypselae 2–2.5 mm, pubescent and papillate; pappi: staminate 6–7 mm (capillary); pistillate 6–7 mm. 2n = 28.
Species 5 (5 in the flora).
|1||Ray lamina apices entire or obscurely to slightly lobed (mid lobes shorter than outers); disc cypselae ± prismatic (not obcompressed)||> 2|
|1||Ray lamina apices usually ± equally 3-lobed (laminae sometimes inconspicuous); disc cypselae obcompressed||> 3|
|2||Cypselae ca. 2 mm, glabrous or sparsely hairy (branches spreading, usually distal)||Monolopia gracilens|
|2||Cypselae 2.5–3 mm, uniformly gray-strigose (branches erect)||Monolopia stricta|
|3||Ray laminae ca. 0.5 mm (inconspicuous); disc cypselae 2-angled (pappi of 2–7 scales)||Monolopia congdonii|
|3||Ray laminae 8–20 mm; disc cypselae 4-angled (pappi 0)||> 4|
|4||Phyllaries distinct or connate (± 1/2 their lengths); cypselae uniformly gray-strigose||Monolopia lanceolata|
|4||Phyllaries connate (± 3/4 their lengths, forming cups with distinct triangular lobes); cypselae glabrous or apically hairy||Monolopia major|