Bicknell : Species of the Genus Hydastylus 387 



slender and long-exserted, more or less spreading and finally re- 

 curved for about half their length, 25-37 mm. long : capsules 3-5, 

 obovoid-oblong or somewhat pyriform, smaller and thinner-walled 

 than in //. serridatus, about 6—7 mm. long : seeds larger than in 

 any other species of the genus at present known, 2—2.5 mm. 

 in longer diameter, flattened acetabuliform, strongly reticulate- 

 pitted. 



Lower California, Sierra de la Lagura, January 24, some 



fruit mature. T. S. Brandegee, Herb. Cal. Acad. Sci. 



Closely related to H. serrulatus, H. cernuus and H. subcernuus 



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but unmistakably a distinct species, as clearly shown by its much 

 larger seeds, longer outer bract and longer pedicels without regard 

 to other characters. These four plants form a group of closely 

 related species constituting a section of the genus rather obviously 

 distinct from the more northern group represented by H. Call- 

 fornicus. The group characters especially to be noted are very 

 thin membranous leaves showing cross-reticulations between the 

 nerves, although these are few or obsolete in H. cernuus and H. 

 subcemuus, more or less spreading or recurved pedicels and very 

 thin-walled, mostly pyriform capsules. 



