A sclepiadea—A sclepias. 301 
green tinged with orange. Hoods of the coronet oblong, 
bright orange-red, and more conspicuous than the petals. Seed- 
vessel hoary, uot prickly. A native of dry localities in North 
America, producing its brilliant flowers nearly all the Summer. 
2. A. Cornirti, syn. A. Syriaca. Milkweed or Silkweed.— 
A robust-growing leafy species from 3 to 4 feet high. Leaves 
large, ovate or oblong, downy beneath, and distinctly petiolate. 
Flowers fragrant, larger than in the preceding, dull purple ; 
hoods of the crown ovate, with 2 lateral teeth. Seed-vessel 
covered with soft prickles. A native of North America only, 
the second name having been misapplied. 
The foregoing species are the only ones at all common in 
gardens, but there are several others equally handsome and 
effective where there is ample space for large subjects. A. 
Douglasit has purplish-lilac sweet-scented flowers; A. incar- 
nata purple and flesh-coloured; A. variegata purple and 
white. 
2. PERIPLOCA. 
Twining shrubs with opposite glabrous leaves and axillary 
cymose flowers. Corolla rotate, having 5 awned scales in the 
throat; lobes spreading. Filaments not combined. Pollen- 
masses granular, applied separately to the stigma. A small 
genus, occurring in the South of Europe and tropical Asia 
and Africa. The name is derived from m-pitdo«y, a coiling 
round, in reference to the habit of some species. 
1. P. Gréca.—A deciduous twiner with rather small ovate- 
lanceolate leaves and purple-brown axillary clusters of flowers, 
appearing in Summer. A very curious and interesting plant, 
growing from 15 to 20 feet high. Native of Southern Europe. 
Physianthus albicans is a showy white-flowered tender 
climber from South America, occasionally seen in sheltered 
localities. 
Orper LXX.-_LOGANIACEA:. 
This is a small group agreeing with the Rubidcee or Cin- 
chonacee in having opposite simple leaves and interpetiolar 
stipules and other characters, but differing in the fruit being 
superior. The Nua vomica and many other deadly poisons 
are produced by members of this family. The species are nearly 
all tropical. 
