175 
ADVENTITIOUS FLOWERS. (4 
by Irmisch in the 13th volume of the ‘ Linnea,’ p. 124, 
t. iv; also by Professor Henslow, ‘ Hooker’s Journal 
of Botany,’ 1849, vol. i, p. 33, tabs. 2, 3. The lower 
palea of this plant forms an inverted flower-bud upon 
its midrib. In some fresh specimens which I have 

Fic. 89.—Lip of outer palea Fie. 90.—Supplementary rachil- 
of Nepaul barley. lus or outer palea of Nepaul bar- 
; ley bearing florets. 

Fie. 91.—Diagram showing ar- Fic, 92.—Supplementary floret 
rangement of supplementary ra- of Nepaul barley; palea removed. 
chillus and florets. 
lately examined I find the structure to be as follows :— 
On each notch of the rachis there are three spikelets 
(fig. 88), each one-flowered, and each provided with 
two linear glumes ; the outer palea in all cases is three- 
lobed at the summit, the central lobe being oblong and 
hollow, forming a kind of hood (figs. 87-89), and covered 
with hairs, which are directed downwards towards the 
centre of the plant. The two lateral lobes are more 
