30 Mr. J. Miers on the genus Salpiglossis. 
rated without bursting. The fact is noticed by Mr. Hassall in 
his memoir “ On the Structure of Pollen” (Ann. Nat. Hist. vii. 
100), who states that so curious a circumstance is not singular, 
as it occurs in Oxyanthus in Cinchonacee, Leschenaultia in Goode- 
niacee, and in some species only of Kpilobium in Onagracee : 
the same is also observable in all the genera of the EHpacridee 
and of Ericacee, with the exception of Clethra, where they are 
simple. From these analogous facts it is evident that this com- 
pound structure of the pollen-grains is not of sufficient import- 
ance to affect in any way the ordinal position of Salpiglossis. 
Mr. Bentham mentions only a single species of this genus, as 
he considers all our garden kinds as mere varieties of S. sinuata. 
On this head I may remark, that I found in Chile, plants which 
I always considered to be two very distinct species, viz. S. stnuata 
(my S. glutinosa) and my S. purpurea (Trav. il. p. 531); but I 
have little doubt that S. picta, S. Barclayana, S. fulva, S. inter- 
media, &c. are all hybrid productions from these two species. I 
always met with S. stnuata growimg near the coast, its corolla 
being constantly of a yellowish white, with brownish stripes ; on 
the contrary, I invariably found S. purpurea at a much greater 
elevation near the foot of the main Cordillera, or within its 
gorges, its flowers being always of a dark lilac, with deep purple 
lines, and never of the yellowish hue so conspicuous in S. sinuata. 
I cannot however refer to my original specimens, as they were un- 
fortunately lost off Cape Horn with my general Chile collections ; 
but the coloured drawings of both species made in 1820, and 
which I have preserved, serve to impress these facts strongly on 
my memory. From the several dried specimens of Salpiglossis 
in Sir Wiliam Hooker’s herbarium collected by Gillies, Cuming 
and Bridges, we may detect at a glance the two different species. 
The following I consider as the amended diagnosis of this 
genus :— 
Satpietossis, R. & P. (char. emend.).—Calyz tubulosus, 10- 
nervis, 5-dentatus, dentibus subzequalibus, attenuatis, obtu- 
siusculis. Corolla ifundibuliformis, tubo imo cylindraceo, 
superne campanulata, compressa, limbo 5-lobo, obliquo, sub- 
bilabiato, lobis profunde emarginatis, superiore majore, erec- 
tiore, zestivatione reciprocativa*. Stamina 5, inclusa, quorum 
4 didynama, quinto breviori, sterili ; filamenta subulata, e con- 
strictione tubi orta; anthere ovate, 2-lobe, basi cordate, sub- 
versatiles, lobis adnatis, rma marginali dehiscentibus ; pollen 
compositum, e granulis 4 aggregatis, quorum 1 superpositum. 
Ovarium conicum, disco carnoso sub-2-lobo impositum, 2-locu- 
lare ; placente centrales, dissepimento utrinque adnate, multi- 
* Ann. Nat, Hist. 2nd Ser. vol. iii. p. 172. 
