MONOCOTYLEDONS. 



623 



Lilium hulhiferum are, on the other hand, normal axillary shoots, and probably 

 the same is the case with those on the infloresence of some species of Allium. 

 Adventitious buds are stated by Hofmeister to occur on the roots of EpipacHs 

 microphylla. 



The Leaves of Monocotyledons are seldom verticillate, though this occurs in 

 the foliage-leaves of Elodea and the bracts of Alisma ; they are very commonly 



Fig. 423.— Cyot7«- verftus: A the bulbous stem seen from above, B seen from below, C from the side and cut 

 throuj^h lengthwise ;yyy the circular line of scars of the cataphyllary leaves, k k the corms which grow in their axils ; 

 h the base of the decayed flower- and leaf-stem, by its side (lik in C) next year's bud, from which a new corm and 

 flower-stem will be produced ; D longitudinal section through this bud, n n its cataphyllary leaves, 1 1 foliage-leaves, 

 h bract, / perianth, a anthers, k a bud in the axil of a foliage-leaf. 



arranged alternately in two rows, as in Graminese, Iridese, Phormium^ Clivta, Typha^ 

 &c. This arrangement either prevails over the whole shoot together with its 

 secondary shoots, or occurs only at first, and then passes into spiral arrangements, 

 which very commonly lead to the formation of rosettes radiating on all sides, as 

 in Aloe (see Fig. 152, p. 193), Agave, Palms, &c. The arrangement with the angle 



Fig. 424.— Bud in the inside of a bulb of Alltunt Cepa, the scales having been removed ; st the short flat base of the 

 stem on which the bulb-scales are inserted ; ImA lamina, sh the sheath of the foliage-leaves still short ; in B the outer 

 leaves have been removed, and an axillary bud k" has made its appearance in addition to the terminal bud k'. 



of divergence Yg is much rarer, but occurs in some species of Aloe^ Carex, Pan- 

 daftus, &c. Spiral arrangements with a smaller divergence than V3 ^-^so occur 

 sometimes; as e.g. in Musa (in M. rubra the angle is, according to Braun, 7^ in 

 the foliage-leaves, "/n i^^ the bracts), and Coslus (where the angle of the foliage- 

 leaves is from y^ to V5), &c. The axillary shoots of Monocotyledons mostly begin 

 with a leaf in close contact with the primary axis and with its back turned towards 



