82 NORTH AMERICAN FLORA [Volume 34 



Anthers with obtuse or acute tips; tube of the disk -corollas shorter 



than the throat. 



Erect or ascending plants with peduncled heads; pappus-squamel- 



lae, if present, not lacerate-fimbriate. 



Achenes somewhat flattened; corolla-tube glabrous, but a 



ring of hairs present at its junction with the throat; pappus 



wanting; outer bracts reduced. 53. Pseudobahia. 



Achenes 4- or 5 -angled, not flattened; corolla-tube pubescent; 



pappus usually present; bracts all well-developed. 54. Eriophyllum. 



Low diffusely branched annuals with sessile heads; pappus- 



squamellae lacerate-fimbriate. 55. ActinolEpis. 



Anthers with subulate tips; tube of the disk-corollas equaling the 



throat. 56. Antheropeas. 



Squamellae of the pappus, if present, dissected at least half their length 

 into numerous bristles; style-tips elongate, lanceolate or linear. 

 Heads radiate; achenes elongate-obpyramidal. 57. Syntrichopappus. 



Heads discoid; achenes short, broadly obpyramidal. 58. Trichoptilium. 



52. MONOLOPIA* DC. Prodr. 6: 74. 1837. 



Annuals, with white-tomentose herbage. Leaves sessile, entire or serrate, all but the 

 lowermost alternate. Heads rather large, pedunculate,- terminating the stem and few branches. 

 Involucre hemispheric; bracts either distinct to the base or connate into a cup with broad 

 triangular teeth. Receptacle high-conic at maturity, muriculate, glabrous. Ray-corollas 

 with ample 3- or 4-toothed or -lobed yellow ligule and bearing at the orifice of the throat on 

 the opposite side a roundish denticulate appendage. Disk-corollas with cylindric glandular 

 tube and dilated throat, the limb somewhat hairy. Style-branches of the disk-flowers with 

 roundish dilated apex or shortly and obtusely appendaged. Tips of the anthers ovate. 

 Achenes all fertile, tapering to the base, quadrangular-compressed, or the outer ones obcom- 

 pressed and somewhat triangular in cross-section, with a small terminal areola. Pappus 

 none. 



Type species, Monolopia major DC. 



Involucre 6-15 mm. high; achenes 2.5-4 mm. long. 1. M. major. 



Involucre 5-7 mm. high; achenes 2 mm. long. 2. M. gracilens. 



1. Monolopia major DC. Prodr. 6: 74. 1837. 



Monolofiia lanceolata Nutt. Proc. Acad. Phila. 4: 21. 1848. 

 Monolopia major lanceolata A. Gray, Bot. Calif. 1: 384. 1876. 



Stem erect from a tap-root, usually simple below, corymbosely branched above, 1-5 dm. 

 high; leaves lanceolate, rather obtuse, 3-10 cm. long, amplexicaul, entire or sinuately dentate; 

 peduncles few, 1-10 cm. long, slightly enlarged at the summit; involucre 6-15 mm. high; 

 bracts united into a cup bordered with triangular acute teeth or (in var. lanceolata) distinct 

 nearly to the base; ray-flowers about 8; ligules yellow, 10-20 mm. long, obovate-oblong, 

 3- or 4-toothed, the appendage oval; disk-corollas 3.5-5 m*n. long, the tube much exceeded 

 by the throat and limb; achenes black, 2.5-4 mm. long, minutely strigose or scabrous, usually 

 glabrate. 



Type locality: California. 

 Distribution: Middle and southern California. 



Illustrations: Hook. Ic. pi. 344; Bot. Mag. pi. 3839; E. & P. Nat. Pfl. 4*: /. 62, N-O; f. 

 124, G. 



2. Monolopia gracilens A. Gray, Proc. Am. Acad. 19: 20. 1883. 



Characters as given for M. major (of which this is perhaps a geographic race), except 

 that the whole plant is more slender and the heads and floral organs smaller; involucre 5-7 

 mm. high; bracts distinct to the base; ligules 5-8 mm. long; disk-corollas 2-2.5 mm. long; 

 achenes about 2 mm. long. 



Type locality: Coast Ranges of California, near New Almaden and Santa Cruz. 

 Distribution: Santa Cruz Mountains, California, and southward near the coast to San Luis 

 Obispo County. 



* By Harvey Monroe Hall. 



