Macbride — Further Notes on the Boraginaceae 19 
agree as to calyx-lobes and grow in the same region M. grandis 
may represent only a large-flowered state of M. franciscana, but 
more material is needed to prove or disprove this possibility. 
a oe ey (Cav.) Pers., var. versicolor (Pers.), ¢ 
nov. M. arvensis (L.) Hill, var. ? versicolor Pers. Syn. i. 156 Gees. 
M. nastier {Paras Sm. in Sowerby’s Engl. Bot. xxxvi. sub t. 
2558 (1814). 
Anchusa lutea Cav. Icones i. 50, t. 69, fig. 1 (1791) is the earliest 
designation for this rather variable but unique species. That 
Cavenilles’ plant is merely the form of the species with corollas 
remaining yellow (the common state has corollas yellow in anthesis 
but soon changing to bright- and then to rose-blue, i. e. the var. 
versicolor) is shown by the adoption of the name M. lutea for this 
species in the authoritative work, Flora der Schweiz by Schinz und 
Keller, 3 Auflage, I Teil 440 (1909). Hermann, in his carefully 
prepared Flora von Deutschland und Fennoskandinavien 384 
(1912) also takes up Cavenilles’ name. It seems to me however 
that this noticeable phenomenon of the color-change that takes 
place in the corolla after anthesis is important enough to justify 
varietal designation of these plants in which it occurs, especially 
since they are of more frequent occurrence than those with corollas 
yellow even in age. 
Onosmopium. Mr. Mackenzie, in his discriminating revision of 
this group as it occurs north of Mexico, endeavored to define the 
genus so as to exclude from it the large-flowered section Macro- 
merioides Gray (Syn. FI. ii. pt. I. 205), and proposed for O. Thur- 
beri Gray the new combination Macromeria Thurberi (Gray) 
Mackenzie, Bull. Torr. Club xxxii. 496 (1905). In regard to this 
transfer of O. Thurberi he wrote: “It seems certainly congeneric 
with M. viridiflora DC., M. cinerascens DC. and M. discolor 
Benth. Whether these species are congeneric with the original 
species of Don [M. exserta] I cannot determine at present, the 
material I have seen being too scanty.”’ Examination of a number 
of good collections of M. exserta has disclosed the fact that the 
nutlets are always keeled ventrally. In all other species the nutlets 
are not at all keeled. Accordingly M. exserta, since it possesses 
this distinctive character of fruit in addition to the great develop- 
ment of corolla with flaring lobes and long-exserted stamens, can 
scarcely be considered congeneric with O. Thurberi and its rela- 
