258 [2471-2484] 
Trelease, W: Flowers and their visitors. 
(Cornell review, Feb. 1880, v. 7, p. 194- 
196.) 
A popular essay on the adaptations of flowers to 
cross-fertilization by insects and other animals, with 
notes on the habits of the latter. W: T. (2471) 
Trelease, W: The foliar nectar glands of 
populus. (Bot. gazette, Nov. 1881, v. Grape 
284-290, 6 fig.) 
Describes the nectar glands at the base of the leaves 
of many poplars, discussing their structure and homol- 
ogy, and their biological significance. Enumerates the 
insects attracted by the secretion of these organs, and 
records his observations on their actions while on the 
plant. W: T. (2472) 
Trelease, W: Jmpatzens fulva, action of 
bees toward. (Bull. Torrey bot. club, Feb. 
1880, v- 7, Pp. 20-21, 12 cm.) 
Describes the behavior of bees while collecting nec- 
tar normally, and when taking advantage of perfora- 
tions in the corolla. W: T. (2473) 
Trelease, W: Insects as unconscious selec- 
tors of flowers. (Amer. nat., Apr. 1879, v. 
13, Pp. 257-260.) 
Abstract of H. Miiller’s **Die Insecten als unbewusste 
Blumenziichter” (Kosmos, 1878, v. 3: July, p. 314-3373 
Aug., p. 403-426; Sept., p. 476-499). W: T. (2474) 
Trelease, W: Nectar, its nature, occur- 
rence, and uses. Extracted from the 
Report on cotton insects by J. Henry 
Comstock, Entomologist to the U. S. De- 
partment of agriculture. [ Washington, 
1880. ] t.-p. cover, p. 319-343, pl. 3, 23X18, 
t 20X11. 
Abstract, by H. Miiller, with same title. 
(Bot. Zeitung, 29 Oct. 1880, v. 38, c. 748- 
749; 24 cm. ) : ‘ bite. 
Abstract, by F. Delpino, entitled ‘‘Netta- 
rii estranuziali” (p. 23-24), and ‘‘Impolli- 
nazione e fecondazione nel cotone e in 
altre specie” (p. 41-42). (Rivista botanica, 
188o. ) 
Abstract, by H. Miiller, entitled ‘‘Nectar, 
was er ist, und einige seiner Verwendung- 
en.” (Bot. Jahresbericht ... Just, 1879, 
V. 7, p. 123-125.) 
Considers nectar and nectaries, floral and extrafloral, 
and their use in attracting insects and other animals 
which cross-fertilize the flowers, serve as a body-guard 
for the protection of the plant against injurious animals, 
or are captured and digested or macerated for the nutri- 
tion of the plant. <A list of papers on the mutual relations 
between flowers and insects, etc., is appended. 
W: T. (e475) 
Trelease, W: Note on the perforation of 
flowers. (Bull. Torrey bot. club, June 1881, 
v. 8, p. 68-69, 25 cm.) 
Records the perforation of the corollas of certain 
flowers by bees, ants and wasps, which rob them of 
their nectar. W: T. (2476) 
PSYCHE. 
Trelease, W: Where honey comes from. 
(Amer. bee journ., 1880, v. 16: Mar., p. 
137-139; Apr., p. 184; May, p. 232-233; 
June, p. 271-272; Aug., p. 386-387-) 
Brief description of the nectar producing parts—floral 
and extrafloral—of several plants; with observations 
on the habits of insects when collecting nectar, and on 
honey-dew. W: T. (2477) 
Treviranus, Ludolph Christ. Ueber Dicho- 
gamie nach C. C. Sprengel und Ch. Dar- 
win. (Bot. Zeitung, Jan. 1863, v. 21, p. 
I-7, 9-16.) 
Discusses the cross-fertilization of flowers by insects, 
going into details especially in the pap/lionaceae, prim- 
ulaceae and orchidaceae. W: T. (2478) 
Trimen, Roland. On the fertilization of 
disa grandifiora. (Journ. Linn. soc., Bot., 
4 June 1863, v. 7, p. 144-147.) 
Describes the structure of the flowers, and believes 
them to be fertilized by ‘“‘some day-flying hymenopterous 
or lepidopterous insect,” which was extremely rare in 
its visits where his observations were made (So. Africa). 
W: T. (2479) 
Trimen, Roland. On the structure of dona- 
tea speciosa, with reference to its fertiliza- 
tion. (Journ.Linn. soc., Bot., 1 Dec. 1864, 
Vv. 9, p- 156-160, pl. 1.) 
Describes the adaptation of the flowers to fertilization 
by insects, but has never seen the latter at work, his 
studies having been made on greenhouse plants. 
(2480) 
Wade 
Unger, Fr. Ueber Zuckerdriisen der Blatter 
und einige von den Blattern uberhaupt 
ausgehende Zuckerabsonderungen. (Flora, 
7 Nov. 1844, p. 703-714.) 
Notes on honey dew, p. 710-714. W: T. (2481) 
Weale, J. P. Mansel. Notes on some spe- 
cles of habenaréa found in South Africa. 
(Journ. Linn. soc., Bot., 3 Nov. 1870, v. 13, 
p- 47-48. ) 
Shows the adaptation of the flowers to fertilization 
by nocturnal insects. W: T. (2482) 
Weale, J. P. Mansel. Notes ona species of 
disperis found on the Kageberg, South 
Africa. (Journ. Linn. soc., Bot., 3 Nov. 
1870, Vv. 13, p- 42-45.) 
Believes the flowers adapted to fertilization by small 
bees or beetles, but has not observed them at work. 
W: T. (2483) 
Weale, J. P. Mansel. Observations on the 
mode in which certain species of ascle- 
piadeae are fertilized. (Journ. Linn. soc., 
Bot., 3 Nov. 1870, v. 13, p. 48-58.) 
Describes the fertilization by insects of the African 
genera gomphocarpus, xyomalobium?, cissus, eucormis, 
pachycarpus, periglossum and cordylogyne. 
W: T. (2484) 
