NEW OR NOTEWORTHY SPECIES. 301 
inch or two long, thin and finely rugose; stipules ovate- 
lanceolate, coarsely incised : flowers scattered in a leafy cyme : 
calyx short-campanulate (in frujt urceolate), the large spread- 
ing bractlets exceeding the proper segments and trifid at the 
broad apex: stamens 10, very unequal, all with subulate- 
dilated filaments : petals small, ligulate, erect or little spread- 
ing, white. 
A rather surprising new species of the Horkelia type, first 
brought to my notice by a former pupil, Mr. Frank T. Swett, 
who conducted me to its habitat on his father's farm, near 
Martinez, Contra Costa County, California, in early May of 
the eurrent year; and Dr. Parry has almost simultaneously 
brought it in from the Santa Cruz Mountains. 
Although by floral character it is next of kin to P. Califor- 
nica, the very type of Horkelia, this plant's great leafiness 
and few leaflets give it much the appearance of a rank P. 
Norvegica. The herbage exhales a heavy oily smell as dis- 
agreeable as that of P. Californica is sweet and pleasant. 
Tissa! LEUCANTHA. Branches numerous from a fleshy fusi- 
form perennial root, decumbent or more depressed, 6—10 
inches long and, with the narrowly linear leaves, dark green 
and entirely glabrous, the inflorescence only, viscid-pubescent : 
stipules triangular-ovate, mostly very acute or acuminate : 
pedicels scattered, an inch long in fruit: sepals dark green, 
with conspicuous scarious margins : corolla 4 inch or more 
in breadth, pure white: the triangular apex of the large 
eapsule well exserted : seed dark brown, very smooth, com- 
pressed, of rounded-pyriform outline, surrounded by a scari- 
ous wing as broad as the body of the seed. 
Common on alkaline flats of the lower San Joaquin, Cali- 
fornia ; abundant at Lathrop and about Byron Springs, also 
in similar soil along the eastern side of the Livermore Valley ; 
flowering in March and April A very showy species, most 
related to the common sea-side perennial, T. macrotheca. 
cup EU E a IPM DEA EUREN 
1 See page 187 supra; also Britton, Bull. Torr. Bot. Club, xvi, 225. 
