MOSSES WITH A HAND-LENS 197 



Sessile, without any stalk, like the leaves 

 of all the mosses or the capsules of Webera. 

 Segments. See under peristome. 

 Seta, the stalk on which the capsule is 

 borne. (Figs. 6 and lo.) 



Sigmoid, curved like the letter S. 

 Spermatozoid. See antherozoid. 

 Sporangium, often applied to the capsule, 

 but by some authors restricted to the spore 

 sac, or inner sac of the capsule containing the spores. 



Spores, small round bodies contained in the capsule, serving 

 the purpose of seeds, but in no way homologous with them. 

 (Fig. 27.) 



Sporophyte or sporophore, the spore-bearing part or genera- 

 tion. In mosses it consists of the seta and capsule and constitutes 

 the so-called fruit. 



Sporogonium, the sporophyte or spore-bearing part of the 

 moss. 



Squarrose, spreading at right angles from the stem. 

 Stegocarpous, having the capsule operctilate. 

 Stipitate, having a short stem. Applied to antheridia and 

 archegonia. 



Stolonifcroiis stem, a slender creeping stem with minute 

 leaves. 



Stomata, pores in the surface of the thallus of the True 

 Liverworts. 



Striate, marked with striae or slight furrows. 

 Struma, a goiter-like swelling on one side at the base of the 

 capsule. (Fig. 8.) 



Strumose, having a struma. 



Substratum, the material upon which the plant grows. 

 Succuhous, with the upper margin of one leaf lying under the 

 leaf next above. (See Plagiochila.) 



Sulcate, deeply furrowed with longitudinal channels. As 

 applied to leaves, both striate and sulcate really refer to the fold 

 whose concave surface is on the inner or ventral surface of the 

 leaf. Of the capsule, deeply furrowed. (Fig. 17.) 



Synoicous or synoecious, having the male and the female 

 organs mixed together in the same cluster. (Fig. 25.) 

 Terete, circular in cross-section. 

 Thallus, a broad, flattened plant form taking the place of 



