42 MISSOURI BOTANICAL GARDEN. 
senting five-sixths of all known Loniceras, and covers the 
whole geographical range of the genus. It is clearly 
distinguished from the second subgenus by its inflores- 
cence, though occasionally three-flowered cymes appear 
and in Lonicera biflora, as I have observed in cultivated 
plants, the inflorescence at the end of the branches becomes 
sometimes quite sessile and regularly three-flowered, re- 
sembling thus exactly the inflorescence of a true Pericly- 
menum, but the lower flowers are always in pairs. The 
section Nintooa which possesses, as L. biflora shows, some 
relation to Periclymenum, has been considered by some 
authors as another subgenus, but it is certainly much more 
closely allied to Chamaecerasus than to Periclymenum, 
which it resembles only in the climbing habit and the 
shape of the corolla. 
Sect. 1. ISOXYLOSTEUM, sect. nov. 
Low shrubs with slender upright or procumbent 
branches, in high alpine regions often forming dwarf 
compact shrubs with rigid sometimes almost spiny branch- 
lets; winter buds small, with two pairs of outer keeled 
scales; leaves rather small, plane or carinate in bud, 
sometimes in threes and with revolute margin; bracts 
usually leafy; bractlets conspicuous, mostly connate into a 
cupula; corolla tubular-campanulate, with spreading 5- 
lobed limb; tube with long hairs inside and 5 nectaries at 
the base; stamens inserted in the middle of the tube or at 
the mouth; style included or exserted; ovaries connate or 
separate, 2- to 3-loculed, each cell with 2 to 3 ovules. 
A group of 7 species restricted to the higher mountains 
of central Asia and distributed from Turkestan to central 
China and the Sikkim Himalaya. 
A. Stamens inserted about the middle of the tube, style half as long 
or as long as the tube; ovaries 2- to 8-loculed; fruits red or bluish- 
black. 1, Subsect. MICROSTYLAE (sp. 1-7). 
