Wolle, Rev. F., Desmids from, 229 ; 



criticism of his figures of Desmids, 



229. 

 Woodward, Dr. H., fossil plants in 



charge of, 375. 

 Woronin, M., criticism of his figures 



(Solms), 3, r.ote^ 

 Worsdell, W. C, comparative ana- 

 tomy of Encephalartos, 445-459 ; 



on transfusion tissue, 301-319. 

 Wright, C. H., preparation of Ball's 



Tables, 120. '■ 



Wulfenia, Jacq., its distribution, 125. [ 



carinthiaca, Jacq., 192. j 



Xanthic colouring matters in roots, 



348, 349. 

 Xanthidium, Ehrenb., 252. 

 antilopoeura, Kueiz., 252. 



var. canadense. Josh., 253. 



var. Johnsonii, West Sf 



West/.*, 253. 



var. minneapoliense,TFb/Ze, 



252. 



var. polymazum, JWirdst., 



252. 



INDEX. 



Xanthidium antilopoeum, var, N. L. 

 j Johnson, 253. 



Arctiscon, Ehrenb., 269. 

 j hisenarium, Ehrenb., var. rotun- 



datum, W. B. Turn., 253. 

 i eristatum, Breb., 253; men- 



tioned, 252. 



var. uncinatum, Breb., 



253. 

 fasciculatum, Ehrenb., 253. 

 — — oronense, West ^ West 



/•*, 253. 

 fasciculatum, Halfs, 252. 

 quadricornutum, Roy ^- Biss., 



mentioned, 254. 

 tetracentrotum, Wolle, 253. 

 Xanthium spinosum, Lmn., 184. 



strumarium, Linn., 184. 

 Xanthophyll, 350. 



Xeranthemum cvlindraceum, Sm., 

 178. 



inapertum, Willd., 178. 

 radiatum, Lam., 178. 

 Xylem transfusion tissue, 317. 



Yellow pigments in roots, 349. 



497 



Zalewski, P., specimens of I^ajas sent, 



387. 

 Zamia, Bronr/n., 445, 456; central 

 cylinder of, 454 ; leaf, 309. 

 muricata, Willd., Mettenius on, 



cited, 445. 

 spermatozoids in, 318. 

 Zannichellia, Mich., mentioned, 380, 

 382, 383, 384. 



palustris, Linn., 208. 

 Zeiller, C. R., on Spencerites, cited, 



359. 

 Zimmerman n, A., observations on 

 Carotin, cited, 350, 353; on trans- 

 fusion tissue, 302. 

 Zizyphus vulgaris. Lam., 146. 

 Zopf, F. W., on colouring matters in 

 the lower organisms, cited, 350, 

 354. 

 Zurich Herbarium, Najas material in, 



437. 

 Zygxemace.e from Lake Alastra, 41, 



42. 

 Zygomorphic appearance of certain 

 Loranthus flowers, 92. 



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