318 Convolvulacce—Pharbitrs. 
by the capsule being 3-celled. The derivation of the generic 
name is obscure, but it is said to come from dp», colour, 
in allusion to the variety and brilliancy of the colours of the 
flowers. 
1. Ph. hispida, syn. Ipoméa purpurea, Convélvulus mu- 
tdbilis and C. mrtyjor (fig. 178). Morning Glory.—The colour 
of the flowers in the typical variety is a deep violet, but like 
its dwarf representative it has given birth to many handsome 
varieties, such as white, rose, carmine, or blue, or a combination 
of two or more of these colours. It is an annual of South 
American origin. 
2. Ph. hederacea, syn. P. Nil var. limbata and Ipomea hede- 
racea.—This is a pretty dwarf annual from North America, of 
which there are several handsome varieties in cultivation, varying 
from azure-blue, blue, or violet and white to carmine and white. 
Leaves distant, petiolate, trilobate, acute, cordate at the base, 
and clothed with silky hairs on both sides. 
Orprr LXXV.—NOLANACE:. 
This is a small order intermediate in characters between the 
last and the next following. The species are herbaceous or 
woody erect or prostrate plants with alternate simple ex- 
stipulate leaves and showy flowers. Calyx deeply 5-lobed, 
valvate in estivation. Corolla funnel-shaped or salver-shaped, 
with a plaited wstivation. Stamens 5, equal, alternating with 
the lobes of the corolla. Fruit of 5 or more distinct or partially 
confluent nuts enclosed in the persistent calyx ; nuts by abortion 
usually only one-seeded. Seeds albuminous. There are six 
genera and about thirty-five species belonging to this order. 
All natives of South America. 
1. NOLANA. 
Trailing annuals with showy flowers resembling those of Con- 
volvulus. Corolla campanulate. Fruit 4-celled, 4-seeded. The 
species are all South American. Generic name from nola, a 
little bell, the form of the flowers. 
1. NV. prostrata.— A prostrate annual with somewhat fleshy 
oval petiolate leaves and solitary axillary flowers about an 
inch in diameter. Corolla violet-blue, with a yellow tube. 
