30 PITTONIA. 
Very common on all precipitous rocky places of Santa Cruz 
Island, from the low cliffs that overhang the sea, to the high- 
est summits; most abundant, however, on the northward slope : 
never inhabiting fair ground where there is a depth of earth, 
but everywhere springing out of the rock crevices, its stout 
woody stems clustered and assurgent. Strictly congeneric . 
with the preceding species, usually 3—4 feet high: heads in 
large ample panicles at the ends of the crowded-leafy branches 
of the year’s growth. It being in flower during the whole of 
my stay on the island, I had the best possible opportunity of 
studying its floral characteristics, reaching this conclusion, 
that we have here a generic type about as well defined as 
genera average in this difficult tribe of Composite. 
3. H. serrata. Taller, more slender and less tomentose 
than the last ; annual growth of branch longer and leaves less 
crowded: leaves 14—2 inches long, obovate, narrowed to a 
somewhat auriculate-clasping base, coarsely and sharply ser- 
rate, of coriaceous texture, in age glabrate on both surfaces : in- 
florescence cymose-paniculate: corollas of a deeper yellow, 
style-tips more exserted and more hairy than in H. detonsa. 
Not yet obtained and perhaps never to be acquired from its 
proper habitat, a small but high, almost columnar island rock 
within a stone’s cast of the middle-southern shore of the 
island of Santa Cruz. Here described from branches taken 
from two bushes (all that were there) found growing on the 
precipitous side of the main island just opposite the islet 
whose towering summit seemed covered with it ! 
Quite distinct from the preceding, yet retaining every 
generical mark and appearance. 
New SPECIES, MAINLY CALIFORNIAN. 
CARDAMINE FILIFOLIA. Annual, slender, a foot or less in 
height, branching above, glabrous and somewhat glaucous: 
leaves pinnately divided into 5 or 6 pairs of linear-filiform 
MEE RS ERIT AE SP ee ee EL O AEE Pe S ENTER PET EESEL NS eee EUN N E E OE EN AE er HE oe TREE ee a 
ee N E HERR 
NAE C Weg ae PT Pe ee RE 
