28 M. Miiller on the Development of the Lycopodiacese. 



and on this point Spring's observations are the most important. 

 His labours are to be found in the ^ Flora ' Journal, 1838, and 

 in the * Fl. Brasiliensis/ pp. 106 — 135. I am not acquainted 

 with a treatise of Link's, which Schleiden cites in the first edition 

 of his ' Grundziige, &c. *,' but it appears of very little import- 

 ance to my purpose. In another memoir however by H. von 

 Mohlf, an attempt is made to open a new path, which will be 

 spoken of hereafter in the places bearing reference to it. Other 

 critical observations are given by Schleiden in his work already 

 mentioned J. Nothing connected, therefore, seems to have ap- 

 peared upon the Lycopodiacece, 



§ 2. The Germinative Spore. 



It is well known that two kinds of spore- cases are distinguish- 

 able in the Lycopodiacea, — 1. for those capable of germination, 

 and 2. for others which apparently have no share in the repro- 

 duction. Spring calls the former Oophoridia, the latter Anthe- 

 ridia. In the latter expression Spring indicates no more than a 

 morphological opposition to the Oophoridia ; he did not entertain 

 any idea of a sexual distinction §. The essential points relating 

 to both sporangia have been long known ; Bischoff has given ac- 

 curate illustrations of them in his work above-mentioned. We 

 have here therefore only to do with the spore which germinates, 

 the development of which I have traced, as also did Bischofi^, in 

 Lycopodium denticulatum. 



This exhibits, on the whole, a great conformity of structure 

 in the different species in which it makes its appearance. They 

 are more or less roundish bodies, which on those surfaces which 

 have been in apposition with each other in the oophoridium, are 

 flattened just like the smaller pollen-like spores. Therefore, since 

 only three or four spores are contained in one of these capsules, 

 they are spherical on the outer surfaces, that is, where they are 

 not in contact, and on the inner side have three or four triangular 

 faces. This is particularly distinct in L. selaginoides, and also in 

 L. denticulatum. In others they are often quite round, for in- 

 stance in L. articulatum and pygmceum. 



A transverse section distinctly shows that they possess two 



• Part 2. p. 82. 



t Morphologische Betracht. iiber das Sporang. der niic Gefassen versehen- 

 en Kvyptogamen. Tubingen, 1837, p. 28, &c. 



X 2 'Vh. pp. 79 — 83. I have here usually cited the first edition, since 

 this is probably now in the hands of most botanists. The second contains 

 nothing new relating to this family. 



§ At least I so understand Spring's words : " capsulas fariniferas et globu- 

 liferas non de essentia sed per accidens solummodo esse diversas neutiquam 

 credo. Est omnino antithesis inter ipsas, sexuali analogo, licet non eadem." 

 (See Fl. 1. Bras. fasc. 7. pp. 106—108.) 



