Refugium Botanicum.| [ Vovember, 1871. 
TAB. 297. 
Natural Order CrassuLACE. 
Genus CoTryLtEepon, Linn. 
Section Umpinicus, D.C. 
C. HORIZONTINALIS (Gussone, Ind. Sem. Hort. Pan. 1826, p. 4). Foliis 
inferioribus petiolatis rotundatis cordatis crenatis supremis 
lanceolatis acutis integris sessilibus, floribus dense spicatis 
horizontalibus vel leviter deflexis, bracteis linearibus, calycis 
lobis brevibus deltoideis, corolle tubo cylindrico segmentis 
deltoideis 8—4-plo superante, filamentis brevibus in tubo alte 
insertis, carpellis tubo equilongis, squamulis hypogynis lanceo- 
latis emarginatis.— Umbilicus horizontalis, D.C. Prodr. ii. 400. 
A native of walls and rocks in the South of Europe, from 
Spain eastward to Greece. 
Perennial, the whole plant glabrous. Stems about a foot long, 
closely leafy throughout, bright red in exposure. Leaves thick, 
fleshy, pale green, not at all glaucous; the lowest rotundato- 
cordate, conspicuously crenate, on erecto-patent petioles exceeding 
the blade; the uppermost lanceolate, sessile, acute, entire, with 
every intermediate gradation. J*lowers very numerous (often 100 
or more), in a dense spike reaching a foot in length, five-eighths 
to three-fourths of an inch in thickness, the upper ones hori- 
zontal, the lower rather deflexed. Bracts fleshy, green, hnear, 
one-fourth to half an inch long. Calyx very short, its teeth 
deltoid. Corolla four lines long, tubular, greenish yellow tinged 
with red, the deltoid teeth one-third to one-fourth as long as the 
tube. Filaments short, inserted high up in the tube. Carpels as 
long as the tube. Hypogynous scales lanceolate, emarginate. 
Tas. 297.—1, pair of flowers; 2, corolla cut open; 3, an anther: 
all magnified.—J. G. DB. 

This fine species of Cotyledon, known in collections as Umbi- 
licus horizontalis, I received from Mons. Van Houtte, of Ghent. 
It seems to grow freely in any light soil; and although it is 
treated at Hillfield as a cool-frame plant, it would probably stand 
the cold of our winters well without protection.—W. W.S. 
