OF ARTS AND SCIENCES : MAY 30, 1865. 531 



3 - 5-floro ; staminibus 5 ; receptaculo longe villoso ; carpellis 5-10. 



— High alpine region of the Sierra Nevada, on Mount Dana, alt. 

 11,000 to 12,000 feet. (Also Bear Mountain, Mariposa, Miss Erring- 

 ton, ex Torr.) Leaves only an inch long ; the leaflets and their divis- 

 ions less than a line in length, nearly sessile, so crowded on the rhachis 

 and imbricated that the leaves may be likened to the shoots of a minute 

 tufted Lycopodium. Flowers like those of the preceding species, ex- 

 cept m size, only a quarter of an inch in diameter. Fruit not seen. 



3. IvESiA PYGM^A, sp. nov. Habitu prtecedentis, sed minutim 

 glandulosa ; foliolis minus confertis, segmentis oblongis setam nunc 

 setulas 2-3 accessorias gerentibus ; bracteis calycibusque parce hir- 

 sutis ; staminibus 10 ; receptaculo breviter piloso ; carpellis circiter 7. 



— Among rocks in the Sierra Nevada, from 11,000 feet (where it 

 aliounds) up to 12,000 feet; Prof Brewer, coll. 1864. — This, more 

 than the last, resembles I. Gordoni on a diminished scale ; and it is 

 possible that all three may run together. This, however, in the speci- 

 mens, is distinguished by some hairiness, especially on the calyx, by 

 the bristle which conspicuously tips each little leaflet or segment, by 

 the less villous receptacle, and by the 10 geminate stamens. 



* * Albifloras, 15 - 20-andr8e ; caulibus gracilibus magis foliatis ; cyma 

 paniculata ; foliis albido-lanatis myosuroideis ; filamentis gracil- 

 limis. 



4. IvESiA PiCKERiNGii, Torr. in Bot. "Wilkes Pacif. Exped. (Calif. 

 & Oregon), t. 4. Pedalis ; foliis primum myosuroideis, foliolis de- 

 mum patentiusculis 3 - 5-partitis sectisve, segmentis oblongis ; pedi- 

 cellis calyce (fructifero obconico-campanulato) brevioribus ; lobis ac- 

 cessoriis calycis ovato-lanceolatis ; staminibus 20 manifeste triseriatis ; 

 antheris mucronulatis ; carpellis 4-6. — Coll. by Dr. Pickering, &c., 

 on the journey from Oregon to California, probably on the Sacramento. 

 (Character from a fragment, and from the plate cited.) 



5. IvESiA SANTOLiNOiDES, sp. nov. Spithamaea ; foliis myosuroi- 

 deis ; foliolis minimis 3 - 5-sectis (segmentis ovalibus obtusis) appressis 

 rhachin arctissime imbricantibus ; pedicellis primariis elongatis fiUformi- 

 bus ; floribus parvis ; calycis tubo cyathiformi lobis propriis dimidio 

 brevioribus, lobis accessoriis parvis ovatis ; staminibus 10? — 15; an- 

 theris didymis baud apiculatis ; carpello unico in fundo calycis sub lana 

 occulto. — In the Sierra Nevada. This is to I. Pickeringii, what I. 

 lycopodioides is to /. Gordoni : its myriad minute leaflet? or segments 



