284 GLOSSARY AND INDEX. 



scutellum, the part of the embryo of monocotyledons that lies in contact 

 with the endosperm, and serves as an organ of absorption, 4. 



seed-coats, 14. 



seedlings, 20. 



seeds, 1. 



dispersal, 10, 17. 



• growth of plants from, 20. 



morphology, 14. 



protection, 10, 17. 



reserve materials, 5, 18. 



vitality, 28. 



sepal, one of the leaves of the calyx, 79. 



septum (pi. septa), a division membrane or wall, 76, 103. 



serrate, toothed like a saw, 58. 



sessile, destitute of a stalk, 58. 



seta, a bristle-like body ; the stalk of a moss capsule, 123. 



sheathing, surrounding the stem like a sheath, 58. 



sieve-tubes, tube-like constituents of the phlogm portion of fibro- vascular 

 bundles containing nitrogenous food substances, 41. 



sinuate, deeply wavy, 58. 



sorus (pi. sori), a heap or collection of sporangia or spores, such as the 

 fruit-dot of ferns, a bed of uredospores, etc., Ill, 131. 



spadix, a fleshy spike ; the inflorescence of Araoeae, 165. 



spathe, the conspicuous, often colored or membranous bract surround- 

 ing the inflorescence or flower of various monocotyledonous plants, 

 e.g. Narcissus, Arisasma, palms, etc., 164. 



specific, pertaining to, or characteristic of species, in distinction from 

 generic, 67, 155. 



species, 155. 



spermaphyte, a seed-bearing plant ; a phanerogam, 95. 



spennatium (pi. spermatia), one of the minute bodies produced in a 

 spermogonium ; formerly assumed to be male reproductive ele- 

 ments, 114. 



spenno^onium (pi. spermogonia), a receptacle producing spermatia, 114. 



spike, an indeterminate inflorescence, in which the flowers are sessile on 

 an elongated axis, 158. 



spikelet, diminutive of spike ; the ultimate inflorescence of grasses, 158. 



spine, 66, 73. 



sporangiophore, the stalk of a sporangium, especially the hypha supporting 

 the sporangium of a mould, 109. 



sporangiiun (pi. sporangia), spore-case, sac containing spores, 109. 



spore, a reproductive body the germination of which does not consist in 



