163 
Saxifrctga ~\ xxxvn. saxifragace^:. 
Moist alpine rocks in Scotland, rare. Near the summit of Ben 
Nevis, and Ben Lawers, but very scarce. Plentiful on Locli-na-gar, 
Aberdeenshire. 2/.. 8 
12. S. tridactyUtes L. ( Rue-leaved S.) ; glandular and viscid, 
leaves cuneate 3 — 5-fid, the uppermost bracteas undivided, 
stem panicled, pedicels single-flowered, capsule inferior. E. B. 
t. 501. 
Common on walls and dry barren ground, in England and the 
Lowlands of Scotland ; rare however in the west of Scotland, and 
especially in the Highlands. ©. 4 — 7. — Stem 2 — 4 inches high. 
Whole plant covered with viscid hairs. Petals small, pure white, 
scarcely longer than the segments of the calyx. Capsule almost wholly 
inferior. 
13. S. hypnoides L. (mossy S.) ; sterile shoots usually pro- 
cumbent and elongated, root-leaves 3-cleft, those of the shoots 
undivided or 3-cleft bristle-pointed or acute and more or less 
fringed, segments of the calyx pointed. — a. leaves of the pro- 
cumbent shoots undivided or 3-cleft, segments narrow, sepals 
ovate, petals ovate. E. B. t. 454. S. platypetala E. B. t. 2276. 
S. denudata Don. — 0. leaves of shoots mostly 3-cleft, segments 
linear, sepals subulate, petals oblong. S. affinis Don : E. B. S. 
t. 2903. — y. leaves of shoots mostly 3-cleft, segments linear, 
sepals lanceolate mucronate, petals spathulate. S. lastevirens 
Don. — 8. leaves of shoots mostly 3-cleft, segments lanceolate, 
sepals ovate, petals ovate. S. elongella Sm. : E. B. t. 2277. — 
e. leaves of shoots mostly 3-cleft, segments lanceolate, sepals 
ovate, petals obovate. S. hirta Don. : E. B. t. 2291. 
Frequent in rocky mountainous situations in England, Scotland, 
and Ireland. %. 5 — 7. — Sepals and petals being merely modified 
leaves, their shape may be expected to vary in accordance with the 
the foliage; so that the above characters, however constant in particular 
localities, cannot be depended on for the distinction of the above 
varieties into species, although they may suffice to indicate the different 
aspects of this abundant and variable plant. We hesitate whether to 
refer S. incurvifolia of Don here or to the next ; one cultivated speci- 
men having the lobes of the leaves mucronate, and another quite 
obtuse, yet not otherwise distinguishable. 
14. S. ccespitusa L.? (tufted alpine S-) ; sterile shoots usually 
very short or wanting, root-leaves crowded fringed 3 — 5-cleft 
with obtuse lobes lowermost sometimes undivided, calyx-seg- 
ments obtuse, fruit hemispherical. — a. smaller, without sterile 
shoots. E. B. t. 794. — )3. larger. S. decipiens Elirh. S. 
palmata Sm. : E. B. t. 455. S. incurvifolia E. B. S. t. 2909. 
Mountains, rare. Rocks of Twll du, and Cwm-Idwell, N. Wales. 
Brandon, co. Kerry. Ben-na-bourd, Aberdeenshire ; Ben Nevis. 
If.. 5 — 7. — We fear that the British species is only a variety of the 
last with obtuse lobes to the leaves. In the Lapland, Norway, and 
