226 Rubiacee—A sperula. 
in terminal heads. Bracts of the involucre shorter than the 
flowers. A native of the Caucasus. 
2. CRUCIANELLA. 
Hispid herbs remarkable for the long slender tube of the 
funnel-shaped corolla. The name is a diminutive of erua, a 
cross, from the disposition of the leaves. 
1. O. stylosa.—A very pretty plant in an otherwise unin- 
teresting genus. A dwarf tufted perennial with slender 
straggling stems and whorls of linear acute hispid leaves. 
Flowers rosy pink, in terminal compact cymes, produced all 
the Summer. The style is conspicuously exserted beyond the 
corolla, hence the specific name. Persia. 
Houstonia cevridea, a North American plant of similar ap- 
pearance, but belonging to another tribe, with opposite leaves 
and a several-seeded capsule, has lilac-blue flowers, and being 
of very diminutive growth is well adapted for rock-work. 
Mitchélla repens is another North American plant, of creeping 
habit, having oval persistent leaves, white flowers, and red 
berries. Some other species of the Cinchondcece are occa- 
sionally seen in the border, but none are perfectly hardy. 
Bouvardia triphylla is one of the best suited for this purpose. 
Orprr LIX—VALERIANACEZ:. 
Herbs with opposite entire or pinnatifid leaves and small 
flowers in dichotomous cymes. Calyx superior, limb lobed or 
feathery. Corolla funnel-shaped, tube often spurred at the base; 
lobes 3 to 5, unequal. Stamens 1 to 5; filaments free, slender, 
exserted. Fruit indehiscent, coriaceous or membranous, with 
one pendulous seed, and often two empty cells. About twelve 
genera, and nearly 200 species occur in temperate countries. 
Valericcna officinalis, a tall plant with pinnate leaves and pink 
flowers having three stamens, is a common English plant. V. 
montane and V. didicu are dwarf species with pink flowers and 
entire or pinnatifid leaves. 
1. CENTRANTHUS 
Perennial herbs. Leaves entire. Calyx - limb feathery. 
Corolla - tube slender, flattened longitudinally, divided and 
spurred at the base. Stamen 1. J*ruit membranous. There 
are ten species, in the north temperate regions of the Old 
World. Named from «évtpov, a spur, and dvtos, a flower. 
