No. 483] 



SrVDIES OF THE OPHIOGI.OSSAClwE 



L51 



the further ramifications 

 of the abaxial bundles to 

 form the reticuhim of 

 veins in the leaf segment. 

 It is clear that in this 

 species three of the four 

 bundles of the petiole are 

 continued unbroken into 

 the spike, while only one 

 of these contributes to the 

 sterile leaf segment. This 

 would certainly tend to 

 confirm the view that the 

 spike is the principal part 

 of the leaf, and the lamina 

 is secondary. 



The base of the spike 

 (Fig. 9, C, D) shows the 

 three bundles, but above 

 the base (E) these bundles 

 may branch, so that a sec- 

 tion higher up shows five 

 bundles. The ramifica- 

 tions of the veins of the 

 fertile part of the sj 



Fig. 10 shows sections of a M'c.n.l toi-m of Ophioglossum, 

 collected at Biiiten:corg, cvidiMiiiy specifically distinct from 0. 

 molurrainnn. It wa. a plant of about \hv ^ainc ^hv, hut it .HflVml 

 both in ilic conlatr Mrrilr leaf and in the and ether ehar;e ters 

 of the spere.. It i. prol.abh- that Fi-.s.uhieh .hou. tiie extreme 

 lower put nf the petiole. aNo belong, to thi^ .per.i<... The l..uer 

 part of the petioh- ill ero.. Motion .hou . hut three l)undh- iuM. ad 

 of four, the nn'.hne a.hixial buiKHe l-ein- ahsent. In a >eetion 

 taken near the juneti..n of the spike and hiinina there were f..nr 

 abaxial l.tnidle." at.d li^e adaxial one.. It i. not e\a< tlv , lear 



