a fee ee ee ee.” 
cece 2s he O Ss, Range See Lee toe 
72 MISSOURI BOTANICAL GARDEN, 
fully employed in the synopsis of species as to require no, 
further description here, and it suffices to call attention to 
the extreme degree of differentiation that has been attained 
in this respect, in the genus, one species of which has 
acquired even erial bulblets. The principal literature of 
the subject, aside from what is said in systematic descrip- 
tions, is to be found in Barbey, 1. c. plates 23-24; Beyer- 
inck, Nederlandsch Kruidkundig Archief, 1884 (Just, xii. 
1, p. 546) ; Haussknecht, 1. c.p.11&16; Ajellmann, Bot. 
Centralblatt, 1886, No. 9, p. 291 (Just, xiv. 1, p. 924); 
Mrs. Millington, Bull. Torrey Club, x. 24; Schmalhausen, 
Erneuerungsweise einiger Epilobien, — Dissertation, St. 
Petersburg, 1874 (Just, ii. p. 531); and Warming, Bot. 
Tidsskrift, ii., and Om Skudbygning etc., Copenhagen, 
1884, p. 84, 87, 95 (abstracts in Bot. Contralbl. xviii. 
and Engler’s Bot. Jahrb. v. p. 65). 
The only other vegetative features requiring special men- 
tion are the water glands ending the teeth on the leaves of 
most species (/teinke, Jahrb. fiir wiss. Bot. x. p. 148, pl. 
12, f. 11); the mucilage glands at apex of very young 
leaves ( Oliver, Journ. Linn. Soc. i. p. 190; Reinke, 1. c. 
and f. 10); the anomalous nutations of the flower buds of 
E. spicatum ( Haussknechi, 1. c. p. 16; Prentiss, Bull. 
Torrey Bot. Club, ix. p. 8, and Véchting, cited under 
pollination ); and the supposed value of the acid cell-sap of 
some trichomes as a protection against the attacks of snails 
( Stahl, Jenaische Zeitschrift, xxii.). 
The principal developmental studies are those by Bar- 
cianu in Schenk & Luerssen’s Mittheilungen, ii. (Just, ii. 
485), — punctum vegetationis and floral organogeny, 
and Sitzber. niederrh. Ges. f. Nat.-u. Heilkunde, 1873, — 
ovary; Payer, Organogen. p. 450, pl. 94, — flower; and 
Warming in Hanstein’s Bot. Abhandlungen, ii. Heft 2, — 
anther. The stigmatic papillae are mentioned by Behrens 
in Anat. Bau des Griffels, etc., — Dissertation, Géttingen, 
1875, p. 33. The pollen, which appears always to consist 
of tetrads, is discussed or figured by Barbey, l. c. pl. 13; 
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