March 7, 1913 : 25 
Trifolium Helleri sp. nov. 
A slender stemmed simple or branched annual, pubescent 
throughout with rather long white hairs. The leaves are ex- 
tremely variable in the different collections of Dr. Heller. No. 
7416 from Los Gatos shows a marked deviation from the type. 
My specimens, collected at Los Gatos, Santa Clara county, Cali- 
fornia, May, 1907, represent the average, hence I have chosen 
them for the description. In very young plants the flowers show 
quite prominently, but as they mature the calyces lengthen and 
conceal the flowers after the manner of 7. columbinum. 
The mature plants have very long slender peduncles. The 
specimens vary from 6 inches when young to 1% feet when ma- 
ture. The cotyledons are 6min. long and 2.5mm. wide. The 
first leaf is simple and almost glabrous on both surfaces, only 
three hairs being detected on the living plant. The blade is 
3mm. long, 4mm. wide, broadly truncate at the apex. The 
petiole is sparsely hairy for the group. 
The species seems to be somewhat local in its distribution, 
having been collected only in Santa Clara county, California, 
but in a number of different places by several collectors. It will 
bafound in herbaria under the names albopurpureum or colum 
binum. 
Annual, about 3dm. high, erect or ascending, pubescent 
throughout with rather long hairs: internodes 5 to 10cm. long: 
leaflets narrowly elliptical, acute at both ends, 2cm. long, 4mm. 
wide, remotely dentate serrate (in some specimens broader with 
almost spinulose margins); petioles of lower leaves 4cm. long, 
upper very short; stipules ovate-lanceolate with a long acutni- 
nation, mostly entire: flowers inconspicuous: peduncles elongat- 
ing with age, 6cm. or more, slender: heads terminal or subter- 
minal, semi-globose when young, ovate-conical in fruit, bluish 
gray: calyx tube 1.2 mm. long, teeth villous, 5mm. long: vex- 
illum ovate, obtuse, slightly inflated at base, 5.5mm. long, 2.5 
mm. wide; corolla equaling or shorter than the teeth, according 
to the stage of growth, deep blue shading to light blue at the 
apex: ovary 2-ovuled: style 3mm. long: legume broadly oblong, 
hairy, thin membranaceous, 3!nm. long, 2.5mm. wide, I-seeded: 
