336 
LXVI. OONVOL VULACE7E 
this genus, and closely resembling Convolvulus .- — Nearly all warm 
countries, absent from Europe. 
Twining or rarely procumbent herbs. Leaves stalked, usually 
entire, sometimes lobed. Flowers large or small, axillary, in 
clusters, heads or racemes, sometimes solitary. Corolla-tube long 
or short ; limb spreading, more or less distinctly 5-lobed, folding at 
the angles. Stamens unequal, attached near the top of the tube. 
Ovary 2- or 3-celled ; style single, long, stigma, terminal, globose 
or 2 -lobed ; ovules 2 in each cell. Capsule opening from the top 
by 4 valves ; seeds 4 or 6, sometimes fewer, large, glabrous or 
hairy. 
The American Sweet Potato, Ipomoea Batatas , having tuberous, edible 
roots and large, purple flowers, is occasionally cultivated in the plains. In the 
FI. Br. Ind. iv. 215, Simla is given as a locality for 7. dasysperma, Jacq. ; but 
there is no specimen from the Himalaya in the Kew Herbarium. 
Flowers pink, purple or blue. 
Flowers large. Corolla l|-3 in. long. 
Calyx glabrous. Corolla-tube long, cylindric . . 1. 7. muricata. 
Calyx hairy. Corolla-tube very short. 
Leaves 3-lobed . . . . . . . 2. 7. hederacea. 
Leaves ovate . . . . . . . 3. 7. purpurea. 
Flowers small. Corolla J-l in. long. 
Lower surface of leaves green, thinly hairy. Flowers 
in sessile heads . . . . . . . 4. 7. eriocarpa. 
Lower surface of leaves silvery-tomentose. Flowers 
in stalked clusters or racemes . . . 6. 7. pilosa. 
Flowers yellow. Corolla | -§ in. long . . . . 5. 7. chryseides. 
*1. Ipomoea muricata, Jacq. ; FI. Br. Ind. iv. 197. Glabrous ; 
stems rough with small, tubercular outgrowths. Leaves ovate, 2-4 
in., cordate, abruptly tapering into a narrow point. Flowers large, 
pale purple, in small, stalked clusters, sometimes solitary. Sepals 
glabrous, broad, abruptly pointed. Corolla funnel-shaped, 2^-3 
in. long ; tube 1-2 in., narrowly cylindric, much longer than the 
calyx, hairy within. Ovary 2-celled. Capsule \ in. diam. ; stalk 
thickened in fruit. 
Temperate Himalaya, 1000-5000 ft. ; August-October. — Hilly districts 
throughout India ; often cultivated. 
2. Ipomoea hederacea, Jacq. ; FI. Br. Ind. iv. 199. Hairy. 
Leaves ovate, 2-5 in., cordate, more or less deeply 3-lobed. 
Flowers large, pale blue, often tinged with pink, in small, stalked 
clusters, sometimes solitary. Sepals linear, hairy near the base. 
Corolla funnel-shaped, 1|-2| in. long ; tube very short. Ovary 
3-celled. Capsule | in. diam. 
Simla, Shali ; August, September. — Throughout India, ascending to 6000 ft. ; 
often cultivated. — Nearly all warm countries. 
3. Ipomoea purpurea, Lam. ; FI. Br. Ind. iv. 200. Hairy. 
Leaves ovate, 1-2 in., cordate, acute. Flowers large, pink, in 
