SEEDLING STRUCTURE IN THE LEGUMINOS Ж, 61 
< Low."— The transition phenomena begin some distance below the external 
collet, and are completed in the collet region—in extreme cases 
before the hypocotyl is entered. By the “completion” of the 
transition is understood the production of collateral stem-like 
bundles, with more or less centrifugal xylem ; the root protoxylems 
may or may not persist as separate entities in the hypocotyl. 
“ Intermediate.” —The transition phenomena usually begin in the region of 
the collet, and proceed slowly all the way up the hypocotyl, 
reaching completion near its summit. This type is subject to great 
variation in detail, and some attempt has been made to obtain a 
finer classification by speaking also of *intermediate-low " and 
" intermediate-high ” transitions. 
IX. This column contains references to the authorities for the statements 
contained in previous columns. The following abbreviations are used :— 
Dod. = Dodel (1869). 
vT. = Van Tieghem (1871, p. 221). 
G. — Goldsmith (1876). 
Gér. — Gérard (1881). 
vT. & D. = Van Tieghem and Douliot (1888, p. 173). 
Dan. = Dangeard (1889). 
T. & T. = Tansley and Thomas (1906). 
Tour. = Tourneux (1910), 
Ch. — Chauveaud (1911). 
C, = The present author. 
X. Where a species is mentioned or described in the text the number of 
the page is inserted in this column, which thus forms an index to the paper. 
No authorities are mentioned for the statements in Column II. as to the 
growth-form of the species. For information under this head various Floras 
have been consulted, especially Hooker's ‘Student’s Flora of the British 
Islands, Hooker's ‘Flora of British India,’ Boissier’s * Flora Orientalis, 
Hooker's * Flora of New Zealand, Rouy’s ‘Flore de France,’ Torrey aad 
Gray’s * Flora of North America,’ and the * Flora Capensis.’ 
