NATURAL ORDER CONVOLVULACE. 
Tribe—CoNVOLVULE®. Section of genus Convolvulus, in which the 
plants are annual, and do not climb. 
Puare XIII.—Convolvulus siculus. Linn. Woods. Grenier and 
Godron. 
GENERIC.—Stigmas two on a simple style. Capsule two or four-celled, 
each cell containing one or two seeds. Corolla campanulate, having five 
angles and five folds. 
Speciric.—COapsule smooth, on recurved peduncles. Corolla bright 
purplish blue, about twice the length of the calyx. Bracts placed close 
to the calyx. Calyx hairy, divided into pointed segments of variable 
shape. Stem ascending, downy, not climbing on other plants. Leaves 
pubescent, somewhat heart-shaped, with more or less prominent auricles. 
Growth that of an annual, with a feeble stem. 
Expianation oF Prats XIII.—This drawing of Convolvulus siculus 
is given, not only on account of its beauty and rarity, but also with a 
hope that some other Mentonese habitat may be found, beside the one 
where alone it has yet been discovered. 
Remarks.—The specimens from which this plate was drawn were 
gathered on April the 21st, in the celebrated Gorge of St. Louis, below 
the Corniche road, where, among the crevices of the precipitous lime- 
stone rocks, these lovely plants are sparingly scattered. Convolvulus 
siculus is one of the rarest plants of this latitude, being in truth, as its 
name imports, a Sicilian and a Southerner. There is no other species 
known to me with which the present can be confused, Convolvulus 
tricolor, so common in gardens, being one of the nearest to it. Many 
other plants of this order are well known for their beauty, and have long 
been cultivated ; among these the Ipomeas, Pharbitis, and Quamoclit, 
stand pre-eminent. Some also, as Ipomea purga, and Convolvulus 
scammonium, yield drugs; the former, which grows at Xalapa, in 
Mexico, affording jalap, and the latter, a native of Syria and the Levant 
gives a root from which Scammony is extracted. Convolvulus siculus is 
given by Grenier and Godron as growing at Toulon and in Corsica, and 
