1922] BLAKE—ASTERACEAE 417 
subherbaceous, appressed; receptacle small, convex; pales firm, 
subindurate, persistent, all or the inner with thinner inflexed mar- 
gins, more or less completely inclosing the achenes; ray corollas 
usually none, when present solitary, ligulate, fertile, the lamina 
oval, bidenticulate to trifid; disk corollas with slender tube, short 
broadly campanulate throat, and 5 equal or longer reflexed teeth; 
stamens with minutely sagittate base and ovate terminal append- 
ages; style branches rather short, slightly recurved, with deltoid 
obtuse papillose-hirsutulous tips; achenes linear-fusiform, narrowed 
to the callous base, often shortly subrostrate, more or less com- 
pressed, lenticular or trigonous in cross-section, wingless, glabrous; 
pappus of a single usually broad deltoid to rhombic-lanceolate or 
oblong paleaceous persistent awn borne on the inner side of the 
achene, or rarely wanting.—Type species M. hexantha Blake. 
A genus of four closely related species from the mountains of Ecuador and 
Peru, related on the one hand to Verbesina, on the other to the imperfectly 
known Monactis H. B. K. In habit and many other characters it makes a 
rather close approach to the Andean species of the section Lreactinia of 
Verbesina, but differs greatly in its linear-fusiform subrostrate wingless achene 
with a pappus of a single broad paleaceous awn. Its relationship to Monactis 
is closer, but the same characters of achene and pappus suffice to distinguish 
it. The short, broadly campanulate corolla throat equaled or exceeded by the 
spreading or reflexed teeth is also characteristic of Monopholis. The genus 
may be inserted in the system next to Monactis. 
In addition to the two species here described as new, two species described 
by Hieronymus under Chaenocephalus but referable to this genus are repre- 
sented by fragments in the National Herbarium. The following key will serve 
to separate the species. 
Heads chiefly pedicellate, the pedicels 1-7 mm. long. 
Heads 6 or 7-flowered, 6-8 mm. high (excluding the corollas), 1.5—3 mm. 
thick in fruit; involucre 3.5—4.5 mm. high; broader phyllaries 1-1.5 mm. 
eh eek ee kee 1. M, hexantha 
Heads about 12-flowered, 7-9 mm. high (excluding the corollas), 3-4 mm. 
thick in fruit; involucre 5-6 mm. high; broader een” 1.8 to 2 mm. 
WHEN re ee oes ce chert cysts . M. pallatangensis 
Heads chiefly sessile, rarely short-pedicellate. 
Branches loosely ee leaves broadly ovate; % flowers 8-11, 
26: panpus Gh 3.9-5.6 Wim. long, 2. eos cc vin vs eres 3. M. holwayae 
Hnaiches “densely cis imo: leaves lance-ovate or lanceolate; 
% flowers 7 or 8, 2 I or 0; pappus awn o0.4-0.8 mm. long 
4. M. jelskis 
