1882 .] 
439 
[Trelease. 
Bonnier, Gaston. (1) Les fleurs et les insectes. An address to the 
Assoc, scientif. de France. (Revue scient.ifique, Apr. 2, 1881, xxvii, 416. 
425. 
Delpino, Federico. (1) Ulteriori osservazioni sulla dicogamia del regno 
veo-etale. Part 1. Milano, 1868-9. From Atti Soc. Ital. Sci. Nat., xi-xii. 
Part 2, Fasc. 2, Milano, 1873-4, Ibid, xvi-xvii. 
Engelmann, George. (1) Spirodela, (Bull. Torrey Bot. Club, Nov. 
1870, i, p. 42-3). (2) Anthers of Lemnae. Ibid, Mar. 1871, n, p. 10-11 
Gillman, Henry. (1) Lenina polyrrliiza again discovered in flower, 
on the Detroit river (Amer. Naturalist, Nov. 1881, xv, p. 896-897). 
Hegelmaier, Fr. (1) Die Lemnaceen, eine monographische Unter- 
suchung, Leipzig, 1868. (2) Uber die Fructificationstheile von Spirodela, 
(Bot. Zeitung, 1871, p. 621-629 ; 645-766, PI. V.) 
Henscliel, August. (1) Yon der Sexualitiit der Pflanzen, Breslau, 1820 
Hildebrand, Friedrich. (1) Die Gesehlechter Vertheilung bei der Pflan- 
zen, Leipzig, 1867. (2) Delpino’s Weitere Beobachtungen (Bot. Zeitung 
1870). (3) Die Farben der Bliithen in ihrer jetzigen Variation und friiheren 
Entwicklung, Leipzig, 1879. 
Morrem, Charles. (1) Reclierches sur le mouvement et l’anatomie 
(du style du Goldfussia anisophylla) (Nouv. Memoires Acad. roy. Belg. 
Feb. 2, 1839, xii. 34 p., 2 pi.). An abstract was published by the author 
(Bull. Acad. roy. Belg. 1839, series 1, vi, p. 59-71) and translated into 
English (Ann. Nat. History, 1839, iv, p. 462-3). 
Roper, F. C. S. Y. (1) Notes on the genus Lemna. A paper read before 
the Eastbourne Nat. Hist. Society, Oct. 18, 1872 (Journal of Botany, 
1873, xr, n. s., ii, p. 28-30). 
Treviranus, L. C. (1) Ueber Dichogamie nach C. C. Sprengel und 
Chas. Darwin (Bot. Zeitung, 1863). 
DESCRIPTION OF THE PLATES. 
In all of the figures the lettering has the same significance ; a, indicates 
the anther; 5, the connective; c, the calyx; cor., the corolla; d , the stig- 
matic disk; f, the filament ; n, the nectar-gland ; o, the ovary ; s, the style; 
st., the stigma. 
Plate 6. 
Figs. 1-4, Lemna minor: — 1, Plant with only the pistil mature; 2, the 
same after maturation of the first stamen ; 3, the same with both stamens 
extended (x 6); 4, a fully developed flower (x 25.) 
Figs. 5-7, Hakea nodosa: — 5, Flower bud just before expansion ; 6, the 
same after expansion (x 7); 7, ovary and nectar gland (x 10). 
Figs. 8-16, Grevillea Thelemanniana : — 8, Flower bud; 9, the same 
after expansion (x 1); 10, flower with nearer half of perianth removed 
