. Botany for high schools and colleges. Botany. 320 BOTANY. for a few species only.* In all which have been examined the spore sends out a promycelium, which is generally short and jointed, and upon this several sporidia are produced, much as in the TJredinese. In Tilletia caries the promyce- lium produces a tuft of slender branches (Fig. 234, h), which. Fig. 221. Pis. 232. Pig. 223. Pig. 231.—Spore-formation in VsHlago Maydls. a, the end of a spore-forming hy- pha containing a row of young spores; 6, anotlier spore-forming hypha, contaming two young spores; c, a spore nearly ripe, still surro
. Botany for high schools and colleges. Botany. 320 BOTANY. for a few species only.* In all which have been examined the spore sends out a promycelium, which is generally short and jointed, and upon this several sporidia are produced, much as in the TJredinese. In Tilletia caries the promyce- lium produces a tuft of slender branches (Fig. 234, h), which. Fig. 221. Pis. 232. Pig. 223. Pig. 231.—Spore-formation in VsHlago Maydls. a, the end of a spore-forming hy- pha containing a row of young spores; 6, anotlier spore-forming hypha, contaming two young spores; c, a spore nearly ripe, still surrounded by the gelatinous mem- brane of the nyplia. X 1800.—After Fischer von Waldheim. Fig. 332.—Spore-formation in UsUlago antherarmn, c. an isoitf - <' gelatinoushy- gha, with the contents distinctly breaking up—at the lower end a portion not yet roken up ; 6, a number of gelatinous byphee fused into an irregular mass, showing the formation of mimy spores ; c, a spore nearly ripe, still siirj'ounded by the gelat- inous hypha membrane, also a young spore upon a lateral brunch, a and c X 1800 ; b X 900—After Fischer von Waldheim. Pig. 223.—Formation of " solitary spores" in Sofispoi mm Saponarim. a, hyphie witli two young spores; 6, a spore at a later stage; c, byphie with spores in differ- ent stages of development; at c' a thin wall has. formed around the contained pro- toplasm as in &; at c" the wall is much thicker, and at e'" it is still thicker. X 300.— After De Bary. have been seen to unite laterally by a kind of conjugation (not, however, of a sexual nature, in all probability); from these branches (called by some writers " secondary spores ")f * According to Fischer von Waldheim, the germination of the fol- lowing species is known, viz., lUletia caries, T. Lolii, UstUago an- tkerarum, XT. floaeulonim, U. carbo, XT. destruens, TJ. Maydis, IT. recep- taculorum, TJ. longissima, U. Vaillantii, Urocyatis pompJiolygodes. Uroc
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