328 THE 
GARDENERS 
CHRONICLE. 
(SEPTEMBER it, 1875. ) | 
to to suggest "ee the lever-like false anther in Salvia 
cross-fertilisa 
d in 
nce, 
Salvia inv вории, wha ere the co 
but subsequent patent spoiled the 
Lobelia is another illustration of = mmni - 
ce to es insect agency. I confess I don 
understand -fertilisation is acbbainplished не 
MOET do Know r that L. Eri m 
inus entirely protected fro 
insects under glass seeds abund . Professor Gray 
says of Habenaria tridentata that in this species the 
it of the sterile anthers receives pollen, and i 
penetrated by pollen tubes ; how far similar processes 
tend in ure it will do no harm to der, 
ex 
though out of place Te in a paper in which 
T" сна is not in order. 
suppose that c oss-fertilieation by insect agency 
be E that is claimed Ari rant that there 
has been an on the ih м aie je avoid self- 
effect cross-fertilisation ч insect 
абиба Fer tal — What has lant 
T, and it is wonderful 
й me. survival of the 
fittest, we must 
se to be the m st fit к i 
survive which pr 
s, all other conditions 
A plant which perfects a thousand 
tter ch 
o 
o 
* 
breeding, 
to favour onl fertilisation by inse 
once that it hse itself in X the sition of of all of of us us 
bis oing work—i 
ot done a a all. This is actually t the case with 
non- self. kralen, The 
—insects 
more niei to their 
duties, Bat grant ing this it ds ost the power which 
a self-fertiliser possesses of taking н of itself both 
at home d al t 
h 
Yucca 
"most. local in its distribution, Eac 
w the insect fert 
many species often will be, 
seed, as I have witnessed myself 
ere an am 
the whole кн would now be well 
is the sam 
the 
ritive power | 
sexual | 
s? "This suggestion. is borne out by facts. I 
h mbers of this Association 
by numerous facts Ж нн. papers, that the male an 
female sex in plants, that is whether the male or 
female organs in the flower are most favoured in deve- 
lopment, is wholly a question J% nutrition, 
pem. I have shown a similar 
flowers of 
A flow Y perfe 
"т does not fruit, [на re it w. 
nde gc 
m 
Rhine reported years ago ane cap in which bees 
more pr than those in which 
But se ач p agr "e 
as Rhine experience long ards 
E om, and beatles fruit je 
and agai ец but most of them set. 
There may be no йереп in the numbe 
holly на question of how favour- 
ач ыга саша am on the maturing 
ing 
matters. I once had a very large w 
nd dpa trained to the roof 
of in which w ae of light but 
little sunlight, but it would no — n summer, 
a few branches ria get through a venti- 
ese alw 
w un 
trates the influence of varying phases of nutrition on 
the floral organs, and I have no ae ша the differ- 
conclusions arrivi y me an 
white Clover could be accounted for in 
т 
trating tbis 5 
given. I will се but one: icta 
‘this year | oaded may not. have one seed vessel n ext. 
"t — times *'late frosts” furnis лн. 
ut more recently “imperfect fertilisation. ет 
Б a row of fifty-two trees about fifteen years old. 
These are all apparently = in RE al es nd 
igour. ost have no see nine и et 
fusion, They were m d UR м s fer 
tilising conditions, eiiis oce 9; т тб за 
aided the SS ae -" es. 
ad d is minem I trust, to pro 
Ist. That bulk аач floweriug plants 
> sei fertiliser 
+ That pas to a limited extent do insects aid 
Каламы 
‚34. Self. fertilisers are every way as healthy and 
mmensely more productive than, 
those ы ичинге: оп insect aid. 
e plants are so dependent, they ar 
‘to engage in the struggle for life, the 
great underlying princi реа 
[From a paper 
3. 
29 
g 
J 
в 
т read han, re the 
American Association for the (lower, of тулы 
at Detroit. ] 
GREENHOUSE PLANTS.—XXIV. 
THEIR CULTURE AND MANAGEMENT. 
Tetratheca (Tremandr 
wering plants are natives 
both appearan 
greenhouse subjects in ordinary cal 
: they are also widely different in appear 
from each other in habit and duration of urnas 
Both the smooth and the woclly-leaved varieties of 
the heath-leaved Tetratheca (T. ericeefolia) com- 
mence flowering in the winter or early spring, and 
keep on even up to the of May, but to have them 
so late as this they must be ially d by 
retarding the opening of their first blooms. Their 
| innumerable pinkish lilac flowers, different in character 
from else, them irable for 
exhibition nd equally so for conservatory 
decoration, where they will last long ; but when 
for this latter placed in a good 
light situation, and not amongst other 
In our region the 
—— 
things that will prevent their receiving А db. the 
light ht and air necessary for their well-bei 
that they get tall before being enough fur- 
nished at the bottom, ai are useless, Plants 
-inch ocu autumn should 
procured 
be wintered h ina ym situation, s the night tem. 
perature is kept 5° to 40°, Young Ee of 
ne сема that have m well grown will haye 
ast year's Pas IO or 12 incheslong. Towards 
the көө сет of March shorten these back to about 
half their length, they will бш. m in a fit condition 
for potting a ont the middle 
advisable to К 
et 
a 
Ca 
similar character, If: 
when turned out of their pots, they are found to have 
plenty of roots, they will bear a 3-inch shift, I 
fibrous peat, not broken too fine, with a moderate 
li 
"- strongest shoots out Риу, bringing them | 
o the rim of the pot. When the roots 
il give air freely, so as to 
is is a ire roe wo 
ould not advise giving a sec 
mes. га it winters better sian the pot are | 
filled ith d | 
If the te have made their wonted progress 
by the end of June the young ato ots will have ex | 
tended considerably, and should h 
ipped out, which wi 
5 
plants well open by training t 
. otherwise their dense h abit does not 
shade and syringe, giving plenty of air i day and night, | 
This and the drier state of the atm sphe ere w d 
d allow 
ings of this d | 
ick clumsy sica d l 
cede to the plant беу ате inten ded to 
The al free-flowering dispo 
