94 BOTANICAL GAZETTE. 



them no where else, of a rich purplish hue. On the mainland 

 they are apparently always cream-colored. 



Convolvulus arvensis, L.. a foreigner, is already more abundant 

 throughout the region of San Francisco Bay than any other species, 

 and is a very troublesome weed in the wheat fields. At the time 

 of my writing the stubble fields are white every morning with its 

 flowers, for it persists in growing and blooming however closely 

 cut down by scythe and sickle. 



No species of the cruciferous genus Cakile appears yet to have 

 been reported from any Pacific shore. But what appears to be C. 

 Americana, Nutt.,is abundant on the beach at West Berkeley. Its 

 only associates there are the indigenous Abronias, Franserias, and 

 the like Pacific Coast maritime species, yet in all probability it is an 

 introduced plant. 



Chrysanthemum segetum, L., a plant nowhere mentioned as 

 even adventive on this continent, has become thoroughly estab- 

 lished in fields and by waysides a few miles north of Berkeley. 

 Being an annual, and well able by its seeds to survive the half 

 year's drouth, it may possibly become the troublesome weed in Cal- 

 ifornia which its sister species, C. Leucanthemum, L., has long since 

 become at the East. 



Picris echioides^ L., the type of an Old World genus allied to 

 Crepis, from which it differs in having a plumose pappus, grows 

 wild in great abundance near Vallejo. P. hieracioides, L., common 

 in Australia, is the only other species of this rather large gems 

 which seems to have obtained a foothold in an} r part of the New 

 World, and is the only one which would have been expected to es- 

 tablish itself in California. But this which runs wild on even the 

 uncultivated hills, almost choking out the indigenous tarweed, is 

 certainly the well marked P. echioides, new to our continent, and 

 perhaps destined to be troublesome as a coarse weed. — Edward Lee 

 Greene, Berkeley, California. 



Parishella Californica. — To the scientific botanist there is 

 no more interesting genus than Nuttall's Nemacladus; and I will 

 remember the satisfaction I had when (in the year 1875) I 

 detected its affinities with the Cyphiece of South America and 

 South Africa. More recently I had the pleasure to describe a 

 second species of this curious genus. In botanizing this last spring 

 upon the Mohave desert, those sharp-sighted botanists and most 

 obliging and excellent correspondents, the brothers Parish, of San 

 Bernardino, California, had the rare fortune to discover a little 

 plant, which upon examination proves to be a new genus of this 

 group. I wish here merely to say that I have taken the opportu- 

 nity thus afforded to dedicate it to the discoverers, in token of my 

 appreciation of the very valuable services which they have rendered, 

 and are zealously rendering to botany and to botanists. Without 

 here entering upon a formal description, I can mention the distin- 



