!60 



COMPOSITE. Madia. 



Plains and hills, throu^'liout California, Oregon, and the interior region ; the Tarweed of the 

 eastern part of the State. An exceedingly variable siiecies. 



G. M. glomerata, Hook. Koughish-hirfluto und glandular, slender, very leufy, 

 about a I'uot liigli : leaves narrowly linear, entire (1 to 3 inches long) : heads small 

 and narrow, in dose clii.sLors terminating tiio stem or paniculate branches, (ir in the 

 upper axils : ray-llowers 2 to 4, or sometimes solitary or wanting altogether : ilisk- 

 liowers 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). — Aviida (jracUis & A. Idrsula, Nutt. ; Torr. & Gray, 1. c. 



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

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

 mum. 



§ 3. Rays 4 to 8, vert/ short, nut exceedin;/ the solitary, disk-flower, which is fertile, 

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

 the ray obuvate-iunate and mure or less pointed : those of the disk straiyht and 

 obliquely obuvate. — IlAUi'JiCAUPUS. {Uarpucarpus, Nutt.) 



7. M. filipes, CJray. Hirsute and glandular, a span to a foot higli, slender : 

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

 filiform jxuluncles, loosely paniculate. — J'roc. Am. Acad. viii. 391. Sclerocarpus 

 exujuas, Smith (I). Narpacarjius viadarioidcs, Mutt. //. exi(juus, Gray in Fiot. 

 Mox. Bound. lUl. 



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

 Tuget 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. Involncre 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. Chalf of the receptacle an herbaceous 3 - 5-toothed cup or inter- 

 nal involucre enclosing the disk-Uower. Corollas glabrous or merely glandular : ray.s 

 extremely short. Akenes obovate or fusiform antl 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 ai)icidation or short beak. Pappus none. — 

 [.ow and dillusely branched or diminutive annuals, all (lalifornian, 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. 18<J. 



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

 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 

 Hemizmiia, as a genus intermediate between that, or Lugap/n/Ua, and Madia. 



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

 Avhite 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-oboompressed and fusiform, tij^ped with a very short incurved beak. — 

 Ilemizonia (Ileinizonella) parvula, (hay, Proc. Am. Acail. vi. 541). 



Klamath Valley, within the borders of Oregon, Cronkliite. Also in the collection of Kdlvyy 

 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 ba!>e or short-peduncled : akenes 



