472 THE VEGETABLE WORLD. 
and universal favourites, from their elegant twining stem, which 
accounts for their name—derived from volvo, to wind round— 
heart-shaped or lobed leaves, and the innumerably varied colours of 
their bell-shaped flowers. 
The Cuscurace# are climbing colourless parasites of both hemi- 
spheres. Mr. Griffiths speaks of a gigantic species which even 
preys upon itself in Affghanistan, where he saw one mass covering 
a Mellon-tree from twenty to thirty feet high. 
PRIMULADS. 
Perigynous Exogens, having monodichlamydeous, monopetalous 
flowers, a free central placenta, and an embryo lying inside a 
large quantity of hard albumen. 
; ny Ral Ss, bushes, or herbaceous plants, with lobed alternate ; 
rosin ie lower ones natalie: flowers in racemes or spikes; cal LIV. Hydrophyllacese. 
rio monopetalous; stamens five, alternate with the Ox yarophy 
ee a 
— y'bes oe dershrubs, with alternate or ppt 
ttl ea n Tion-atoe ate ; flowers loosely panicled; calyx . Plumbaginace. 
and corolla behing esac gota 8, With a narrow tibe or five petals COREY.) “ 
with along claw ; ns opposite the petals; five styles. 
Herbaceons plan aa in rosettes, flowers in spikes ; v9 dite 
parted; inbeicate 1 ‘- re corolla monopetalous ; stamen: CCXLVI. Plantaginacexe. 
alternate with the petal ne style. 
Herbaceous, iat: ert rubby plants; leaves radicle ; 
flowers in radical scapes and poet Bere to noe aia: — Jo 
petalous; stamens opposite the 
equal in number to its segments; Rone, pose gap one mre 
Trees orshrubs, with alternate leaves, serrated, or entire, coriaceous t 
CCXLVII. Primulaces. 
smooth ; flowers in umbels, corymbs, or panicles, small white or red ; 
fruit indehiscent, 
: inacez. 
calyx four = five cleft ; stamens opposite the petals; aa ae i 
The Hyproruyts are little known out of the American conti- 
nent. Nama and Hydrolea occur in India; some of the Nemophila 
are garden favourites cherished for their elegant flowers ; the Pium- 
BAGINACEX grow in the salt marshes and sea-coasts of the tempe- 
rate parts of the world, along the Mediterranean basin, others in 
Greenland and the mountain ranges of Europe, and a few within 
the tropics ; Plumbago zeylanica from Ceylon to Port J. ackson ; the 
Aigialitis grow ss the mangroves of Australia ; Vogelia at the 
Cape of Good Hope 
The P LANTAGINACE, often stemless herbs, are scattered over the 
world, but they prevail chiefly in temperate latitudes; their foliage 
is slightly bitter and astringent;*their seeds are covered with mucus, Me 
which renders many of them emulcent. 
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