Stereid 



OF BOTANICAL TERMS. 



Stipe 



STE'RELD, a cell of stereome, 

 which see. 



STEREOME, strengthening tis- 

 sue: a term applied by 

 Schwendener to that part of 

 a flbro vascular bundle to 

 which it chiefly owes its 

 strength; also to the cortex 

 on physiological grounds, it 

 often serving mainly for sup- 

 port. Compare Mestome. 



STE REOPLASM, the solid portion 

 of protoplasm. (Niigeli.) Com- 

 pare Hygroflasm. 



STEREOPLA§mA, see Stereo- 

 plasm. 



STERIG'MA (pi. Sterlg'mata), 

 (1) the downward prolonga- 

 tion of a decurrent leaf upon 

 the stem; (2) a very narrow 

 support to a spore, as the 

 pointed protuberances upon 

 basidia, or the filaments bear- 

 ing spermatia and stylospores. 



STilR'ILE, (1) unfruitful; barren 

 — as a plant which fails to blos- 

 som or fruit, a pericarp which 

 contains no seeds, or a stamen 

 which produces no perfect pol- 

 len: (2) devoid of living organ- 

 isms — used mainly in bacteri- 

 ology. 



STERILE FLOWER, one con- 

 taining no perfect pistils. It 

 may or may not contain sta- 

 mens. 



STERILIZE, to render free from 

 all living bodies, as fluids in 

 which bacteria are to be culti- 

 vated . 



STER'NOTRLBE, a term applied 

 to zygomorpliic flowers which 

 have the stamens so placed that 

 a visiting insect will receive 

 the pollen upon its under sur- 

 face, as in most Papilionacese. 

 Compare Notothibe and 

 Pleurotribe. 



STER'6m, see Stereome. 



173 



STI€HID'lTJM (pi. Stfohld'Ia), a 

 branch of the thallus in red 

 algae (Florideae) containing 

 tetraspores. 



STlG'MA, the part of the pistil 

 which receives the pollen. It 

 is usually the apex of the style, 

 variously expanded, which is 

 destitute of epidermis and se- 

 cretes the "stigmatic fluid," 

 which see. 



STiGMA-DiSK, a disk forming 

 the seat of a stigma, as in 

 Asclepias. 



STIGMAT'iC CELLS. OF THE 

 ARCHEGO'NltJM, see L I d- 



CELLS. 



STIGMAT'iC CHAMBER, the 



part of the rostellum in or- 

 chids in which the viscid disk 

 or retinaculum is developed. 

 (Functionless as a stigma.) 



STIGMAT'iC FLtJiD, a viscid 

 fluid secreted by the stigma 

 at maturity which serves to 

 hold the pollen, and in which 

 the pollen-grains germinate as 

 the first stage of fertilization. 



STILOGONID'IIJM, see Stylo- 

 spore. 



STlM'ULOSE, covered with sting- 

 ing hairs. 



STIM'ULUS (pi. Stim'ull), see 

 Stinging-hair. 



STlNG, see Stinging-hair. 



STING'ING HAlR, a glandular 

 hair which secretes an acrid 

 fluid; sting; stimulus. 



STIPE, a term applied to various 

 kinds of stalks or stems, in- 

 cluding the petiole of ferns. 

 the stalk of a mushroom, the 

 stem of a pappus above the 

 seed, the stalk of an ovary 

 raising it above the receptacle, 

 etc. Various forms of stipes 

 in flowering plants are distin- 

 guished under the terms the- 

 caphore, gynoplwre, anilio- 



