76 Univcrsiiy of California FubJicatiohs in Bofa)ty [Vol.6 



Bidens chiapensis sp. iiov. 



Caulibiis glabris, tetragonis : foliis oppositis; foliolis 3, ovato- 

 acuminatis, basi cuneatis, margine serratis, minute ciliatis, iitrinque 

 glabris, ca. 6 cm. longis, 2.5 cm. latis ; petiolis 2-3 cm. longis ; pedun- 

 culis ]-2. caules vel ramos terminantibus. 8-24 cm. longis; capitulis 

 multitloris. involucri squamis exterioribus ca. 25, linearibus, apice 

 acutis, ciliatis, ca. 1 cm. longis, qiiam squamis interioribus oblongo- 

 acutis, longioribus ; ligulis tiavis ca. 7 mm. longis ; corollis tiavis ; 

 achaeniis biaristatis. 



The uppermost leaves are often reduced to a single leaflet. Col- 

 lected at high altitude of the Cerro del Boqueron. No. 6945. Type, 

 Herb. Univ. Calif., No. 173022. 



Cosmos sulphurea Cav. exaristate form. The specimens of this 

 species collected on Sierra de Tonala are awnless, but there seems to 

 be no other divergence from the usual form of the species. No. 6793. 

 Univ. Calif. Herb., No. 172476. 



Bidens geraniifolia sp. nov. 



Undique fere glabra : caulibus striatis : foliis pinnatisectis, lobis 

 sectis. 4-5 cm. longis, 2-3 cm. latis; petiolis ca. 1 cm. longis, basi 

 paululum pilosis: capitulis solitariis pedunculos ca. 1.5 dm. longos 

 terminantibus ; pedunculis caules terminantibus vel axillaribus : in- 

 volucri bracteis exterioribus linearibus patentibus interiores aequant- 

 ibus: ligulis 7-10, albis multilineatis, apice 3-dentatis : achaeniis 

 juvenibus planis breve 2-aristatis. 



This is a species much resembling B. odorata Cav. Collected in the 

 high region of Cerro del Boqueron. No. 6679. Type, Herb. Univ. 

 Calif.. No. 172257. 



Dahlia Purpusii sp. nov. 



Perennis, glabra: foliis plerumque simplicibus, ovatis, acuminatis, 

 sessilibus, margine crenato-serratis, ca. 12 cm. longis, 6.5 cm. latis : 

 involucri bracteis exterioribus late ovatis, acutis, ca. 1 cm. longis : 

 ligulis ca. 4 cm. longis, 1.3 cm. latis, acutis, purpureis: achaeniis calvis. 



This simple leaved Dahlia, according to the notes of Dr. Purpus, 

 is a large perennial. Collected in the high regicm of Cerro del 

 Boqueron. Only a few specimens could be fouml. No. 6680. Type, 

 Herb. Univ. Calif., No. 172256. 



