172 CALIFORNIA ACADEMY OF SCIENCES. 



toothed, not surpassing the flowers; paleae of the receptacle 

 minute, ciliate sometimes dihited at apex: fruiting involucre 

 2-flowered, minutely-puberulent, 6-8 mm. armed with about 

 30 stout subulate, hooked spines, 2 mm. long: beaks 2, 

 stout, nearly equaling the spines. — ?an Gregorio. 



In this, as in several of the other species, it is not un- 

 common to find more than one pistil from a single cell. 



Feanseria flexuosa Gray. The specimens collected from 

 San Esteban represent an extreme form of the species. It 

 becomes eight feet high, the leaves are large and much dis- 

 sected, axils woolly, and the spines of the fruit are either 

 straight or hooked. Tiie involucres of the S heads (30-6- 

 flowered) are rotate, 5-10-cleft, not surpassing the flowers: 

 paleae of the receptacle linear-acuminate. — San Esteban. 



Feanseria ambrosioides Cav. Growing in clumps eight 

 feet high. — San Gregorio. 



Franseria chenopodiifolia Benth. The stout spines are 

 rather broadly dilated at base and canaliculate on the upper 

 surface. — In various forms from Magdalena and Santa Mar- 

 garita Islands to San Fernando. 



Franseria ilicifolia Gray. Leaves often 3 inches long 

 and 2 inches broad, all the teeth spinose: S heads few 

 above the 9 , very broadly campanulate: lobes of the 

 about 10-tootlied involucre, subulate longer than the tube, 

 much exceeding the numerous (30-60) pubescent flowers: 

 palea3 of the receptacle linear-siDathulate, densely woolly- 

 pubescent.— Cajon de Santa Maria. 



Xanthium strumarium L. — Growing around water-holes 

 near San Gregorio and Comondu. 



Heliopsis buphthalmoides (Jacq). The specimens from 

 Santa Margarita Island are smaller and less pubescent than 

 the others and have much smaller heads. — Santa Margarita 

 Island, San Gregorio, Comondu. 



EcLiPTA ALBA Hasskarl. — Purisima, Comondu. 



