416 COMPOSITE. 



4. A. YoseiiiitaniiS. Madia YosemUana, Parry ; Gray, Proc. Am. 

 Acad. xvii. 219 (1882). Small and slender, sparingly branched, only 4 — 6 

 in. high, leaves few and the lowest opposite; hirsute pubescence only 

 scanty: rays 5, light-yellow; disk-flowers about 3: ray-achenes semi- 

 obovate (scarcely incurved); pappus as in the last, — Damp moss, at the 

 foot of the Upper IJosemite Fall, Br. Parry. 



5. A. radiatns. Madia radiata, Kell. Proc. Calif. Acad. iv. 190 

 (1873). Annual, erect, 1 — 3 ft. high, hirsute and viscid: larger leaves 

 broadly lanceolate, denticulate: bracts of involucre 10—20, with short 

 tips; rays rather light-yellow, % in. long; the receptacular chaff between 

 rays and disk united: disk-achenes (all but the central ones fertile) 

 somewhat clavate and 4-angled, nearly straight; those of the ray flat and 

 obovate-falcate, tipped with a small reflexed beak, all destitute of 

 pappus. — Lower part of the San Joaquin Valley, near the mouth of the 

 river. A very peculiar species, local, and rarely collected; more vernal 

 in its flowering than the other species. 



57. HARPiECARPUS, Nuttall. Small annuals, with glandular- 

 viscid sweet-scented herbage, entire narrow leaves, and numerous pedi- 

 cellate small few-flowered heads. Ray-flowers fertile, 4—8, the rays 

 minute. Disk-flowers 1 — 4, enclosed in a tubular cup of an united circle 

 of receptacular chaif. Achenes slender, compressed or obcompressed; 

 pappus none. 



* Leaves alternate; achenes laterally compressed.— Habfjecarpvs proper. 



1. H. exiguus, Gray, Bot. Mex. Bound, 101 (1859); Sm. in Rees' Cycl. 

 (1816), under Sclerocarpus. Harpxcarpus madarioides, Nutt. Trans. Am. 

 Phil. Soc. vii. 389 (1841). Madia filipes, Gray, Proc. Am. Acad. viii. 391 

 (1873). 3{adia exigua, Greene, Eryth. i. 90 (1893). Slender, 1 ft. high 

 more or less, hirsute, glandular above, paniculately branched, the small 

 heads on long filiform naked peduncles: leaves linear: involucral bracts 

 5 — 8, lunate, almost destitute of free tips, hispid-glandular: cup of 

 receptacle prismatic and very narrow, enclosing a single straight 

 obliquely obovate achene; ray-achenes obovate-lunate, pointed by a 

 small disk. — Open woods and glades among the higher hills, especially 

 northward. June — Aug. 



* * Leaves mostly opposite; achenes obcompressed. — Genus 

 Hemizonella, Gray. 



2. H. parvnlns. Hemizonia parvula & iJurandi, Gray, Proc. Am. 

 Acad. vi. 549 (1865). Hemizonella parvula & Durandi, Gray, 1. c. ix. 189 

 (1874). Much branched from the base, 2—3 in. high, hispidly hirsute 



