219 
indicated that Picradenia may be considered a subgenus of 
Hymenoxys, Cuss. It" this view be correct the Colorado Uubber 
plant is therefore a species of Hymenoxys. 
In July, 1906, Mr. Naylor forwarded to Kew a further supply 
of material. Accompanying this was the following extract from 
the letter which Mr. Naylor had received with the specimens :- 
"I have obtained a sample of crude rubber from the experimental 
plant at Buena Vista; this is, of course, not vulcanised, and il 
kept in a warm place will become soft and sticky. Hie round 
piece is just as it comes from the plant : the Hat piece is after its 
second trip through the machine, and in this form is shipped east 
to the refinery. The full size of the pieces as shipped is It) to l.» 
feet long and 18 inches wide. The root of the native plant yields 
about 10 per cent, of rubber." 
From the evidence thus obtained there is hardly room for 
doubt that this species of Hynvnuxya yields a rubberdike 
product. This does not, however, compare favourably with many 
of the lower grades of rubber already on the market. It is there- 
fore somewhat doubtful whether the expectations which have 
been formed regarding it in some quarters will be realised. 
.1. M. II. 
XXXVII.-IRISH GARDENS. 
At the invitation of Mr. Moore, of Glasnevin, and at the desire 
of the Director of Kew, I spent a fortnight in June in visiting 
some of the more interesting gardens in [relate!. Mr. Moure was 
fortunately able to accompany me. and. favoured by their pro- 
prietors, we inspected the gardens of the 
.K Una. tiM- i. M" n r-1 ,N to W:i , >' Vi s. 
Fota, Belgrove, Darreen, Rossdoh..- , As on near Queens- 
town, and several other gardens in the neighbourhood of Dublin. 
Our special object was to ascertain what had been done in the 
direction of establishing reputedly tender iivk - 
perennial plants in the more favoured parts of the island, both 
. . ..,..:- 
Of South Cornwall and South Wales, where ,ie, cimianc conditions 
are similar to those of the south and west of Ireland. Y> o were 
therefore in a position to make o 
with regard to what might be tried in Ireland. He tilings we 
Ireland is f axon 'l vith\. lim u I. n niai i s, a soil most 
'■'■■••_ 
horticulture. 
During the whole fortnight (the latter half of Jui 
:].■■■■■.:■.. . . ■ - ...■■■ ~ 
with regard to Irish gardening that the tools most needed are the 
