NOTES ON: COMMELINACES. 201 
Wallich’s collection, and was favoured with permission to dissect 
the plants in Linneus’s own herbarium. At the British Museum I 
saw the type-plants of R. hath and other older collectors, and the 
fine collection of Welwitsch. At Paris I looked t through the 
general herbarium, and saw also Kunth’s private herbarium, some 
fine old collections from Australia, and some Arabian collections, 
At Geneva I saw the three great herbaria there; Boissier’s is very 
rich in fine sets of Balansa and other first-class modern scllesagne. 
while DeCandolle’s contains Poiret’s and other old collections, and 
is specially valuable from having been steadily worked and adnoted 
upon from the early days of Aug. Pyr. DeCandolle to the present 
time. Through the wey of M. Cogniaux, the Brussels Herbarium 
was sent me at ; it contained many types of Martens and 
Galeotti, some of Seubert, The Berlin Herbarium was a me 
at Kew throu h the kindness of Hichler; this was invaluable, as 
seen written up by him in the Candollean and Berlin Herbaria. 
astly, when my work was near completion, Mr. alae 
laced in my hands the MSS. of R. Brown, which contain very 
full descriptions of all the Commelinaceous material he had access 
to at the date. He seems to have taken a special interest in the 
order, and in his diagnoses of Commelina puts in front the number 
of cells and ovules in the ovary. I have followed him as regards 
the Australian species ; from his very close manner of working he 
may have admitted a few too many, as I’. Mueller has warned me 
hesitate to red uce R. Brown's genic ne I shall not be sur- 
and M. DeCandolle placed in my hands the sixty years’ collection 
of notices accumulated in his herbarium. ope that not much 
of importance has escaped me; but, in the present state of botanic 
literature, I dare not hope that there are no omissions. 
EXPLANATION OF PLaTE O51. 
1. oY Sect. Monostichos.—e. Indehiscent gage (x 2or3). d. Hori- 
zontal section of same. Hila axial; embryos exter! eds of Bes cell of 
the same ea. Ran te in situ, seen from without; the sa a of each is 
seen without. }. The seeds as in c, but seen from within; the hila ae rst the 
= an mam a. aad section of one seed (x 10) through the em 
. Com Diagram of flower; showing the whorls of its parts, viz. :— 
(1). ‘Cier of ‘tres iepeles imbricate, one —— exterior. (2). Of three prey 
imbricate, and ne wholly exterior, alternat ing with whorl (1). (3). Of three 
stamens, ng with whorl (2). (4). Of three ees alternating with 
Bos (3). (5). Of three carpels, alternating wtth whorl (4). 
Go flower, showing Ae whorls of its parts, v 
(1). "Otter of three sepals, imbricate, one wholly exterior. (2). Of rat Poe 
D 
