166 MISSOURI BOTANICAL GARDEN. 
BB. Bractlets of each whorl connate into a cupula as long as the 
ovaries; style pilose; all leaves distinct. 
24. Subsect. THORACIANTHAE. 
Subsect. 21. Phenianthi, comb. nov. 
Periclymenum, [Tournefort, Inst. Rei Herb. 1: 608 
(1700)]. — Medicus, Phil. Bot. 1:126 (1789), not 
Miller. — Spach, Hist. Nat. Vég. 8 : 344 (1839). 
Caprifolium § Periclymenum, Roemer & Schultes, 
Syst. Veg. 5 : 263 (1819). 
Periclyma, Rafinesque, Ann. Gen. Sci. Phys. 6: 83 
(1820). 
Phenianthus, Rafinesque, l. c. 
Lonicera § Hantemon, Rafinesque, New Fl. N. Am. 
3:20 (1836). 
Lonicera § Periclymenum, Dippel, Handb. Laubholzk. 
1: 212 (1899). 
Lonicera § Caprifolium Regulariflorae, Zabel in Beiss- 
ner, Schelle & Zabel, Handb. Laubholz-Ben. 450 (1903). 
This group contains 5 species, four in North America dis- 
tributed from the southern Atlantic States to British Colum- 
bia and Mexico, and one species native to China. They 
are twining shrubs with deciduous or persistent foliage; 
at least the uppermost pair of leaves below the inflorescence 
connate into a disk; flowers in terminal heads or spikes, 
sometimes reduced to one whorl; bracts and _ bractlets 
small, sometimes half as high as ovaries; corolla 3.5-6 cm. 
long, yellow to scarlet or purple, tube more or less ventri- 
cose or gibbous, three to six times longer than the short 
almost regular or two-lipped limb; stamens inserted below 
the base of the limb; style glabrous, but pilose in ZL. céliosa. 
A. Flowers in peduncled spikes or heads; stamens inserted much below 
the base of the limb; filaments longer than anthers. 
B. Bractlets small; calyx almost obsolete; leaves usually oval to 
oblong, obtusish. 
