OP ARTS AND SCIENCES. 51 



V. 



CONTRIBUTIONS TO THE BOTANY OF NORTH 



AMERICA. 



By Asa Gray. 



Presented June 13, and October 11, 1876. 



1. Characters of Canhya {n. gen.) and Arctomecon. 



WITH TWO PLATES. 



CANBYA, Parry, nov. gen. Papaveracearum. 



Sepala 3, caduca. Petala 6, obovata, diu persistentia, deraum scari- 

 osa, capsulam obvolventia. Stamina 6-9 : filaraenta antheris oblongo- 

 linearibus breviora. Ovarium subglobosum : placentae 3, nerviformes, 

 multiovulatfB : stylus nullus : stigmata 3, oblongo-linearia, reflexo- 

 divaricata, ovario adpressa, placentis superposita, facie superiore 

 (interiore) prorsus papillosa. Capsula ovoidea, membranacea, a vertice 

 ad basim trivalvis, valvis placentas filiformes cum stigmatibus persistentes 

 nudantibus. Semina plurima, elongato-oblonga, parum arcuata; testa 

 laevissima nitida ; rhaphe baud prominula nuda. Embryo prope basim 

 albuminis minimus, cylindraceus. — Herbula annua, glabra, parum unci- 

 alis ; foliis alternis linearibus integerrimis subcarnosis cum ramis 

 brevissimis ciBspitoso-confertissimis ; scapis perplurimis filiformibus 

 (semipollicaribus) unifloris ; petalis l«te albis. 



Canbya CANDIDA, Parry. South-eastern California, in sandy soil 

 on the Upper Mohave River, Dr. E. Palmer, May 18, 1876 (in flower 

 and fruit). — This charming little winter-annual is one of the discov- 

 eries made by the botanical party, consisting of Doctors Palmer and 

 Parry and Mr. Lemmon, which passed last winter in S. E. California 

 and adjacent districts. Dr. Parry, who immediately recognized its 

 botanical interest, proposed to dedicate the plant to our common friend 

 and worthy fellow botanist, William ]\I. Canby, Esq., of Wilmington, 

 Delaware ; and I have peculiar pleasure in carrying this proposition 

 into effect. 



