360 COMPOSITE. Madia. 



Plains and hills, throughout California, Oregon, and the interior region ; the Tarweed of the 

 eastern part of the State. An exceedingly variable species. 



6. M. glomerata, Hook. Eoughish-hirsute and glandular, slender, very leafy, 

 about a foot high : leaves narrowly linear, entire (1 to 3 inches long) : heads small 

 and narrow, in close clusters terminating the stem or paniculate branches, or in the 

 upper axils : ray-flowers 2 to 4, or sometimes solitary or wanting altogether : disk- 

 flowers 2 to 4 : akenes slender and straightish, at least those of the disk, which are 

 either compressed or prismatic-fusiform and rather acutely 4-5-angled (2 to nearly 3 

 lines long). Amida gracilis & A. hirsuta, Nutt. ; Torr. & Gray, 1. c. 



Sierra Valley, and all the adjacent eastern portion of the Sierra Nevada ; thence through the 

 interior even to the Saskatchewan. A true Madia with flowers reduced, sometimes to a mini- 

 mum. 



3. Rays 4 to 8, very short, not exceeding the solitary disk-flower, which is fertile, 

 and enclosed in a 3 - 5 -toothed herbaceous cup : corolla glabrous : akenes of 

 the ray obovate-lunate and more or less pointed : those of the disk straight and 

 obliquely obovate. HARE/ECARPUS. (Harpcecarpus, Nutt.) 



7. M. filipes, Gray. Hirsute and glandular, a span to a foot high, slender : 

 leaves narrowly linear : heads small (hardly 2 lines in diameter), globular, on long 

 filiform peduncles, loosely paniculate. Proc. Am. Acad. viii. 391. Sclerocarpus 

 exiguus, Smith (1). Harpcecarpus madarioides, Nutt. H. exiguus, Gray in Bot. 

 Mex. Bound. 101. 



Common in open grounds, at least from Monterey northwards, extending near the coast to 

 Puget Sound. 



56. HEMIZONELLA, Gray. 



Head few -flowered, heterogamous ; the rays 4 to 5, pistillate; the disk-flowers 

 solitary or rarely a pair, perfect and fertile. Involucre torosely lobed in the manner 

 of Madia, i. e. of as many herbaceous scales as there are ray-flowers, each infolded 

 and completely enclosing its akene, but rounded on the back and generally flattish 

 on the inner face. Chaff of the receptacle an herbaceous 3 5-toothed cup or inter- 

 nal involucre enclosing the disk-flower. Corollas glabrous or merely glandular : rays 

 extremely short. Akenes obovate or fusiform and more or less obcompressed, and 

 those of the ray incurved, glabrous or sparsely hairy; the small terminal areola 

 oblique, either sessile or raised on an apiculation or short beak. Pappus none. 

 Low and diffusely branched or diminutive annuals, all Californian, hirsute and 

 glandular ; with linear entire and mostly opposite leaves, and small heads of yellow 

 flowers, at least the lateral ones leafy-bracted. Gray, Proc. Am. Acad. ix. 189. 



In their heads, and somewhat in their general aspect, these little plants resemble the Harpce- 

 carpus section of Madia ; their akenes are as completely enclosed, although from the form of the 

 akene the involucral scales are not conduplicate or carinate. It is better to separate them from 

 Hemizonia, as a genus intermediate between that, or Lagophylla, and Madia,. 



1. H. parvula, Gray, 1. c. Diffusely branched, 2 or 3 inches high, hispid with 

 white hairs : leaves narrowly linear, an inch or less long, the uppermost clustered 

 around the short-peduncled or almost sessile heads : akenes narrow, falcate, between 

 triangular-obcompressed and fusiform, tipped with a very short incurved beak. 

 Hemizonia (Hemizonella) parvula, Gray, Proc. Am. Acad. vi. 549. 



Klamath Valley, within the borders of Oregon, CronkhUe. Also in the collection of Kellogg 

 and Harford, the station not recorded, and the specimens too young. 



2. H. Durandi, Gray, 1. c. Diffusely much branched, a span or so high, hirsute 

 or somewhat hispid : leaves linear, about half an inch long : central heads naked 

 on slender peduncles, the lateral ones 2-bracteate at base or short-peduncled : akenes 



