OF ARTS AND SCIENCES : MAY 30, 1865, 529 



stylus cum ovarii apice articulatus. — Pinnatifolioe, plurifoliolatae ; foli- 

 olis subsparsis saspius incisis vel partitis, superioribus confluentibus. 



§ 1. Genuinaj. 

 * Foliolis subrotundis cuneatisve dentatis incisisque. 

 •f— Calycis segraentis accessoriis vera adtequantes vel iis subconfor- 

 mia. CyniiB subfolioso-bracteatas, floribus alaribus longius pedi- 

 cellatis. 



1. HoRKELiA Califorkica, Cham. & Schlecht. If. grandis, Hook. 

 & Arn. II. capitata, Torr. Bot. Wliipp., non Lindl. — California. 

 Accessory calyx-lobes, or some of them, only occasionally bifid at the 

 apex or toothed. In one specimen, from Los Angeles, Wallace, in a 

 single flower only, there is a broadly subulate sterile filament, longer 

 than the fertile ones, between each petal and its anteposed stamen ! 



Var. ;3. cuneata. H. cuneata, Lindl, I cannot distinguish as more 

 than a smaller variety of Chamisso's species, with accessory calyx-lobes 

 more conformed to the true ones, leaflets smaller, more cuneate, &c. 



Var. y. SERiCEA : pube molli sericea subcauescens. — Oakland, near 

 San Francisco. 



-J- -i- Calycis segmentis accessoriis quam vera multo minoribus. 



2. HoRKELiA PARViFLORA, Nutt. Oregon, Nuttall. Nevada, Dr. 

 Newberry, Dr. C. L. Anderson. 



3. HoRKELiA CAPITATA, Lindl. Oregon, Douglas. 



♦ * Foliolis angustis lobatis seu profunde incisis, laciniis lobisve linea- 

 ribus ; stipulis laciniatis vel pectinatis. Calycis segmentis acces- 

 soriis linearibus vel subulatis. Cymas demum perfectge multiflorae. 



4. HoRKELiA FUSCA, Lindl. Subviscoso-pubescens ; foliis demum 

 glabratis ; petalis anguste cuneatis obcordatis. — Oregon, Douglas. 



5. HoRKELiA CONGESTA, Hook. H. Mrsuta, Lindl. Villoso-bar- 

 bata, superne denudata ; petalis late obovatis vel rotundatis ungue an- 

 gusto. S. Oregon, Douglas, Nuttall. N. California, Newberry. 



6. HoRKELiA TENUiLOBA. II. fuscci var. tenuUoha, Torr. Bot. 

 Wlii{)p. Pacif. R. R. Surv. 4, p. 84. Villoso-canescens ; foliolis brevi- 

 bus (lin. 3-4 longis) ambitu cuneatis profunde palmato-4 - 8-partitis, 

 sinu medio sa^pe profundiori, lobis linearibus ; calycis segmentis ac- 

 cessoriis linearibus vera lanceolata suba^quantibus ; petalis anguste 

 oblongo-spathulatis emarginatis ; filamentis lanceolatis. — Santa Rosa 



