40 Contributions from the Gray Herbarium 
L. pinetorum Greene has also been collected in Chihuahua (Z£. W. 
Nelson, no. 6137) and this number, like the New Mexican and 
Arizonan material has soft, not at all papillose, spreading pubes- 
cence (especially on the petioles) and decidedly acute leaves. In 
L. pustulata the bases of the hairs are enlarged so as to give the leaf- 
surface the appearance of being covered with white pustules. Both 
species are relatives of L. floribunda (Lehm.) Greene which, like 
L. pinetorum, has not been reported from Mexico, but seems to be 
represented there by E. W. Nelson’s no. 4764 from Durango. The 
specimen is in full fruit but it is doubtful if flowering material will 
prove it distinct. In all probability sooner or later other Lappulas 
of the southwestern United States will be found south of the 
Mexican boundary. 
’ Lappula brachystyla (Gray), comb. nov. Echinospermum brachy- 
centrum Ledeb., var. brachystylum Gray, Proc. Am. Acad. xxi. 413 
(1 886). Annua tenuis erecta aa et pode! stri ise arce 
ramosa circa 2 dm. alta; foliis oblongis 8-12 mm. longis, saHignlftieg 
in petiolum at ttenuatis ceteris sessilibus; racemis mis foliaceo-bracteatis; 
pedicellis fructiferis calyce brevioribus; corolla minuta; stylo breve 
nuculis non longiore; iitalin tuberculatis facie dorsali convexis 
vix ongis margine inflexo minute aculeato-glochidiatis vel 
aculeis obsoletis. — British CoLumBia: Spence’s Bridge, Thomp- 
son River, May 29, 1885, James Fletcher, no. 1553. 
Dr. Gray wrote (1. c.) ‘‘ Our plant accords well with Ledebour’s 
figure (Ic. Fl. Ross. iv. t. 302) except that the style is not exserted 
beyond the apex of the nutlets.”’ In view of the distribution of 
L. Redowskii Lehm., var. occidentalis (Wats.) Rydb., which appears 
to be more common in Siberia than the species itself, it would not 
be surprising to find another Asiatic species of this group in the far 
Northwest. However L. brachystyla is a distinct species although 
it is more closely related to a plant of northern Asia than to any of 
our Lappulas. Lipsky has shown, Act. Hort. Petrop. xxvi. 553 
(1910), that Ledebour included two species in his Echinospermum 
brachycentrum, i. e. his type and E. rupestre Schrenk. The drawing 
of the fruit in Ledebour’s figure (I. c.) is of the latter species. In 
fruiting characters our plant is very near to L. microcarpa ae: ) 
Girke which, according to Lipsky, 1. c., Ledebour confused in his 
herbarium with EZ. rupestre. In my juistertniennt L. microcarpa is 
the nearest relative of L. brachystyla; but the pubescence of the 
former is mostly appressed on the stem and branches and the style 
