892 PASTURAGE AND OVERSTOCKING. 
Boraginace :—Borage (Fig. 148), Viper-bugloss, Com- 
frey, Phacelia, Virginia Lungwort, Hound tongue, Grom- 
well, False Gromwell. 
Scrophulariucee :—Scrophularia nodosa (Simpson’s honey- 
Fig 148. Fig. 145. 
ASCLEPIAS TUBEROSA. PLEURISY ROOT, ASCLEPIAS SYRIACA. 
plant), Veronicas (Fig. 144), Yellow Jessamine of the 
South, whose honey is poisonous. (Dr. J. P. H. Brown.) 
Asclepiadacee :— The common Milk- ; 
weed (Fig. 146), or Silkweed, Asclepias 
Syriaca, is much frequented by bees, 
but these visits are often fatal to them. 
All the grains of pollen of the Silkweed, 
in each anther, are collected in a com- 
pact mass, inclosed in a sack; these 
sacks are united in pairs (a. Fig. 147) 
by a kind of thread, terminated by a : 
; POLLEN OF MILKWEED. 
small, viscous gland. These threads  g, sacs of pollen in 
stick to the feet (b. Fig. 147) and often Pats (the same at- 
to the labial palpi (46) of the bees, who (From ‘‘A BC of Bee 
_ a Culture.’’) 
cannot easily get rid of them, and per- 
ish. In some parts of Ohio and Western Llinois, a variety 
Fig. 147. 
