GLOSSARY AND INDEX. 



155 



SorUS (plu. sori) (Gr. awpds, a heap 

 or cluster), the clusters of fruit in the 



POLYPODIACE^E. 



Spat U late (Lat. spatula, a little 



spoon), shaped like a spatula. 

 Species, 43. How to determine, 68. 

 Specific Names, 41. 

 Spermaphyta (Gr. o-n-epjuia, a seed 



and fyvvov, a plant), 50. Literature 



of, 59- 

 SpinulOSe (Lat. spina, a thorn), 



thorny. 

 Spleenwort. Vide Aspleni- 



um. 



Sporangium (plu. sporangia) (Gr. 

 (Tropes, a seed, and ayyos, a vessel), 

 the case or capsule enclosing the 

 spores, 10. 



Spore (Gr. an-opos, a seed), the fruit 

 of the higher cryptogams, produced 

 asexual ly, 10, 18. 



Sporocarp (Gr. o-Ti-opd?, seed, and 

 KapTrds, fruit), the fruit-bearing re- 

 ceptacle in Marsilta, etc. 



SquamOUS (Lat. squama, a scale), 

 with appressed scales. 



Stellate (Lat. stella, "a star), star- 

 shaped. 



Stipe (Lat. stipes, a stock), the stem 

 of a frond, 8, 25. 



Stoma (plu. stomata) (Gr. a mouth), 

 the breathing pores of plants, 26, 33. 



Stramineous (Lat. stramen* 

 straw), straw-colored. 



Struthiopteris. Vide Ono- 

 clea. 



Sub- (as a prefix), about, nearly, 

 somewhat. 



Sub-Orders, 44- 



Subulate (Lat. subula, a shoe- 

 maker's awl), awl-shaped. 



Superior, higher, applied to indusia 

 that are attached above the sorus as 

 in Aspidium. 



Synonymy, 43. 



Tsenitis, 88; also 6, 13, 76. 

 Ternate (Lat. terni, three each), 

 branching into three nearly equal di- 



Tertiary Age, Pteridophytes of, 



66. 

 Thallophyte (Gr. 0aAA6s, a young 



shoot, and </>UTOV, a plant), a group of 



plants including the lichens, fungi, 



and algae. 

 Thalloid (Gr. 0a\\6s, a young shoot, 



and elSos, form), having the form of a 



thallus, i.e., no leafy axis. 

 Thalloid Phase, 19. 

 Tissues, 24. 

 Tissue Systems, 25. 



TomentOSe (Lat. tomentum, a 

 stuffing of wool), covered with mat- 

 ted woolly hairs. 



Tomentum (Lat. a stuffing of 

 wool), the dense matted woolly hair 

 found on some ferns as many species 

 of Cheilanthes. 



Tri- (Lat. iris, three), (as a prefix) 

 three, thrice. 



Tribes, 44. 



Trichomanes, 122; also 6, 11,17, 



79- 

 Trichomes (Gr. 0ptf, hair), hairs, 



variously modified as scales, indusia, 



sporangia, etc., produced from the 



epidermal cells, 26. 

 Triquetrous (Lat. triquetrus), 



three-angled. 

 Truncate (Lat. truncare, to cut 



short), cut off abruptly. 

 Tufted, growing in clusters. 



U 

 Undulate (Lat. undula, a little 



wave), wavy-margined. 

 Uredineae, 50. Literature of, 55. 



Vallecuia (plu. valleculce), the 

 grooves on the stems of Equisetum. 



Variation among species, 2. 



Varieties, 44 



Vascular (Lat. vasculum, diminu- 

 tive of vas, a vessel), containing ves- 

 sels, as ducts, etc. 



Velum (Lat. a curtain), the membra- 

 nous margin of the fovea in Isoetes. 



Venation (Lat. vena, a vein), the 

 veining of the frond, 10. 



