BOTANICAL EXCURSION TO NORTH CAROLINA. 55 
Long before we reached the summit we again met with the 
new Saxifraga,! which we had previously gathered on the 
mountains near Jefferson; but we now found it in great 
abundance, both in flower and with mature fruit. It grew in 
the greatest profusion on the dripping face of a rocky preci- 
pice near our encampment for the night, on the northwestern 
side of the mountain, five or six hundred feet beneath the 
highest summit. The vegetation here is so backward that 
the Saxifraga leucanthemifolia growing on the brow of this 
precipice was not yet in blossom, and the Savifraga erosa, 
Pursh, in the wet soil at its base was scarcely out of flower, 
while at the foot of the mountain it had long since shed its 
seeds. We were therefore enabled to satisfy ourselves that 
S. erosa belongs to the section Hydatica, and that the S. 
Wolleana, Torr. & Gray, from a mountain near Bethlehem 
in Pennsylvania, is only a variety of this species. Pursh 
gathered his plant in Virginia, “ out of a run near the road 
from the Sweet Springs to the Union Springs, five miles from 
the former.” But if this species be the Robertsonia micran- 
thifolia of Haworth’s Succulent Plants, as is most probable, 
and consequently the Aulaxis micranthifolia of this author’s 
1 Saxifraga Careyana (spec. noy.): foliis radicalibus longe petiolatis 
glabris (tenuibus) ovato-rotundis grosse crenato-dentatis basi truncatis vel 
subcordatis, scapo gracili nudo apice paniculato-cymoso, floribus effusis, 
pedicillis filiformibus, petalis lanceolato-oblongis sessilibus sepala recurva 
plus duplo superantibus, carpellis diseretis turgidis demum divaricatis 
ealyce liberis. Variat 1, seapo petiolisque glabriusculis : 2, seapo pedi- 
cillis nec non pagina foliorum pilis viscosis pubescentibus : 3, scapo foliis 
aut bracteis foliaceis 1-2 instructo: 4, foliis ovalibus oblongisve, nune 
argute dentatis, in petiolum plus minus attenuatis. 
Crescit in rupibus humidis opacis altissimorum montium comitatus 
Ashe, presertim ad montem Grandfather dictum, alt. 3500-5000 pedes: 
Junio floret. Herba spithamza, rarius pedalis. Flores parvi. Petala 
consimilia, sessilia, subtriplinervia, alba, immaculata. Filamenta subu- 
lato-filiformia. Carpella ovoidea, stylis brevibus apiculata, (stigmatibus 
subinerassatis,) basi vix aut ne vix coalita,ad maturitatem per totam 
suturam ventralem dehiscentia, ut in pleris Saxifragis plus minus apocar- 
peis. Semina ovalia, striis elevatis denticulatis (per lentem augentem) 
longitudinaliter notata. Species distinctissima, habitu ad sect. Hydaticam, 
sed characteribus ad Micranthem accedens. 
