1920] SMITH— BULBILS OF LYCOPODIUM 437 



Summary 



1. The origin and vascular bundles of branches, leaves, and 

 bulbils are described, and the conclusion is reached that the bulbil 

 is comparable to a leaf rather than to a branch. 



2. The accumulation of starch in the bulbil proper is ascribed 

 to the absence of phloem in the narrow neck joining it to the base, 

 and the detachment of the ripe bulbil to the disorganization of the 

 xylem walls in this region. 



3. The rate of growth is estimated from the persistent bases 



of the bulbils, and observations are made on the habits of the 

 plant. 



McMaster University 



Toronto, Canada 



LITERATURE CITED 





1. Campbell, D. H., Mosses and ferns. London and New York. 1895. 



2. Cramer, C, Pflanzenphysiologische Untersuchungen (Nageli and 

 Cramer) 3:1855; cited by C E. Jones. 



3* Goebel, K., Organographie der Pflanzen. Jena. 1901. 



4. Hegelmaier, F., Zur Morphologie der Gattung Lycopodium. Bot. Zeit. 



30:775-779, 789-801, 805-819, 821-833, 837-851. 1872. 

 5« Jones, C. E., The morphology and anatomy of the stem of the genus 



Lycopodium. Trans. Linn. Soc. London. II. Bot. 7:15-35. pis. 2. 1905. 



6. Saxelby, E. Mary, The origin of the roots in Lycopodium Selago. Ann. 

 Botany 22:21-53. pis. 2. 1908. 



7. Seward, A. C, Fossil plants, vol. 2. 1910. 



8. Sinnott, E. W., On mesarch structure in Lycopodium. Bot. Gaz. 

 48:138-145. pL 1. 1909. 



9- Stokey, Alma G., The roots of Lycopodium pithyoides. Bot. Gaz. 



44-57-63- pis- 2. 1907. 



10. Strasburger, E., Die Coniferen und die Gnetaceen. 1872. 



11. , Einige Bemerckungen liber Lycopodiaceen. Bot. Zeit. 31:81-95, 



97-no, 115-119- 1873." 



12. Wigglesworth, Grace, The young sporophyte of Lycopodium compla- 



natum and L. clavatum. Ann. Botany 21:211-234. pis. 2. 1907. 



