Macbride — Certain Borraginaceae 55 
Incidentally I might mention that besides this great leaf-variation 
among different clumps of plants, the leaves seem to grow propor- 
tionately broader so that, although they may be quite linear while 
the plant is in flower, by the time it is in fruit they are distinctly 
of a lanceolate type. The variation in the character of the pubes- 
cence on the stem, however, is much better marked, and further- 
more, as Rydberg indicates in his Flora of Colorado, 292 (1906), 
the plants with merely strigose stems have somewhat shorter corol- 
las and are confined to the central Rocky Mountain region. This 
is L. Torreyi of Nuttall, but, since intermediates are frequent, it 
may become 
L, RUDERALE Dougl., var. Torreyi yy ), comb. nov. L. 
Torreyit Nutt. Journ. Acad. Phil. vii. 44 (1834). 
There is yet another way in which this species varies and that is 
in the size of the nutlets and the prominence of a flange, or collar- 
like constriction, around the base. This character was observed by 
Aven Nelson (Il. c.) in a specimen from Idaho and he wrongly ap- 
plied Rydberg’s name, being misled, in part, by the large nutlets 
attributed to that plant. Although the nutlets of all specimens 
show a tendency to be constricted at the base, and although they 
vary from 3 to about 6 mm. long, the plants from southwestern 
Idaho and eastern Oregon to western Nevada exhibit these charac- 
teristics in such a pronounced degree (as well described by Nelson, 
1. c.) that they seem to merit recognition as a variety, and may bear 
the name 
L. ipo Dougl., var. macrospermum, nom. ruderale 
Dougl., var. lanceolatum A. Nels. Bot. Gaz. li. O72 intl} as to 
description and specimens cited, not L. lanceolatum Rydb. Mem. 
. Y. Bot. Gard: i. 333 (1900). 
LITHOSPERMUM CALCICOLA Robinson, Proc. Am. Acad. xxvii. 182 
(1892). L. Conzattii Greenm. Field Col. Mus. Bot. Ser. ii. 239 
(1912) appears to be only a young state of L. calcicola. Greenman 
wrote (I. c.), “ it differs in having larger flowers and smooth nut- 
lets.’”’ These are characters which are known to vary greatly in 
American species, for instance in the L. angustifolium group, where 
the nutlets may be quite smooth or distinctly pitted on the same 
plant. Although the type of L. calcicola has pitted nutlets, some 
specimens which agree perfectly otherwise, even to having small 
flowers, have smooth nutlets, as no. 5381 of Purpus from San Luis 
