OP ORNAMENTAL EXOTIC PLANTS. 
73 
2.— TROP^OLUM EDULE Eort. THE EATABLE TROP^OLUM. 
Engraving. — Paxt. Mag. of Bot., vol ix., p. 127. acute. Spur of the calyx elongated. Upper petals much larger than 
Specific Character. — Stem climhing. Root tuberous. Leaves the others, emarginate. Filaments of the stamens recurved, 
with long twisted petioles, digitate, peltate ; leaflets linear-lanceolate, 
Desceiption, &c. — This is a very distinct species, from the twisted footstalks of the leaves, and the narrowness 
of the leaflets. The tubers, when cooked, taste something like a very firm potato. The flowers are yellow, hut 
they generally drop off before they expand, so that they are seldom seen excepting in the hud, when they have a 
deep greenish hue in the thick part, though the spur of the calyx, which is drawn out to some length, is of a bright 
orange-yellow. The plant is a native of Chfli, and it was introduced about 1840. 
3.— TROP.^OLUM AZUREUM Miers. THE BLUE TROPflDOLUM. 
Engravings. — Bot. Mag., t. 3985 ; Bot. Reg. for 1842, t. 65 ; Petals equal, bilohed, entire, much longer than the ealyx. Spur of 
Paxt. Mag. of Bot., voL ix., p. 247 ; and out jig. 1, in PI. 17. the calyx conical, shorter than the sepals. 
Specific Character. — Leaves five-lobed; segments linear, equal. 
Desceiption, &c. — It was long supposed that it was impossible to have blue flowers in any genus where most 
of the species were either red or yellow. It has, however, been discovered that this supposition was incorrect, and 
in the year 1842 it so happened that two plants with blue flowers were introduced, belonging to genera of which all 
the species before known had either red or yellow flowers. One of these plants was the Blue Tropseolum, a native 
of Chili, where it was found growing on the mountains at the height of about four thousand feet above the level of 
the sea. The plant when not in flower resembles T. hracliyceras, in the slenderness of its stem and its general 
habit of growth ; but it is like T. edule in the shape of the leaves and their twisted footstalks. Since the plant 
was first introduced, it has been found to vary considerably in the colour and size of its flowers, some of them being 
of a deep violet colour, and others of a light azure blue. 
4 TROP^OLUM LOBBIANUM EooTc. MR. LOBB’S TROPiEOLUM. 
Engravings. — Bot. Mag., t. 4097 ; and out Jig. 3, in PI. 17. 
Specific Character. — Leaves orbicular, obscurely lobed, peltate, 
(lobes mucronate,) glaucous on the under side. Stem climbing, hairy. 
Spur of the calyx draivn out, hairy. Upper petals obovate, entire, or 
sub-lobed ; lower ones much smaller, roughly toothed, fringed in the 
lower part, and on long slender claws. 
Desceiption, &c. — This very handsome species was found in Columbia by Mr. Lobb, collector to Messrs. 
Veitch, nurserymen, of Exeter, and it was sent home early in the year 1843. Its leaves, though at first sight they 
appear to bear considerable resemblance to those of the common garden Nasturtium, will be found, when closely 
examined, to be very curiously formed ; being slightly lobed, and bearing small bristly points at the extremity of 
what would have been the lobes had they been fully developed. The flowers are of a flame colour, and at first 
sight look a good deal like those of the smaller garden Nasturtium ; but when closely examined, they will be foimd 
to be much more curiously formed, particularly in the lower petals. 
5.— TROP^OLUM CRENATIFLORUM Eoolc. THE NOTCHED-FLOWERED TROPflSOLUM. 
Engravings. — Bot. Mag., t. 4245 ; and our Jig. 4, in PI. 17. to be distinguished from the calyx, obovate, spreading, subequal, trun- 
Specific Character. — Very smooth. Leaves peltate, semi-orbicular, cate at the apex, crenated. Spur attenuated, higher than the flower, 
with a broad truncate base, five-lobed, lobes obtuse. Petals scarcely 
Desceiption, &c. — This species is another of those found by Mr. Lobb in Peru, and it was introduced by him 
in 1846. The whole of the flower is yellow, except the extreme point of the spur, and the tip of each segment of 
L 
