446 BOTANICAL GAZETTE [JUNE 
mature seeds containing embryos have been found, and from them it is seen 
that it is slender, cylindrical, curved into a half circle, 3"™ in length, incum- 
bent, the radicle about as long and nearly as broad as the cotyledons, inferior; 
testa brown, coriaceous ; albumen fleshy, rather copious. G. pungens usually 
has two follicles, sometimes three or by.abortion one. Here it is interesting 
to note that the other species do not have their solitary follicles inserted on 
the center of the disk. The stigma is somewhat lateral, and in G. pungens 
more decidedly so., The generic description of Glossopetalon will have to be 
slightly amended so as to include this plant, but the additional characters 
derived from the new form and from mature seed seem only to strengthen its 
anomalous position. 
A fourth species G. meionandrum Koehne,' collected in the Gunnison 
region, Colorado, by Dr. Purpus, has been added to the genus. 
Horkelia (Ivesia) mutabilis, n. sp.— Stems several, 34" high, 
erect, branched above, villous, leafy: stipules ovate-lanceolate, 
acute, 5-7™" long; basal leaves numerous, 12-20% long, silky- 
hirsute, pinnate, leaflets hfty or less, sessile, more or less imbri- 
cated, 2-5™™ long, usually divided to the base into obovate- 
oblong pointed segments: cyme much branched, many-flowered, 
open: disk 4™™ in diameter: bractlets triangular-lanceolate, half 
as long as the broadly triangular-lanceolate sepals: petals yellow, 
exceeding the bractlet but not as long as the sepals, narrowly lance- 
olate-obovate, acute: stamens five; filaments filiform, 2™™ long: 
Styles two to seven ; akenes few and usually mottled. 
Table and Charleston mountains, Nevada, and Pine valley 
mountains, Utah, Dr. C. A. Purpus, nos. 6195, 6079, 6351. 
The anthers in some of the specimens are purple. 
PURPUSIA, n. gen.— Calyx tube elongated, tubular, widening 
above ; lobes five, valvate ; bractlets none: petals five: stamens 
five, opposite the sepals; filaments filiform; anthers didymous: 
disk lining the calyx tube and thickened at the base: carpels 
Six or seven on a stipitate receptacle; styles nearly terminal, 
filiform, articulate at base; embryo somewhat curved ; cotyledons 
broadly oblong, about four times the length of the small inflexed 
superior radicle: akenes attached laterally slightly above their 
base: leaves alternate, imparipinnate ; stipules adnate to base of 
petiole: stems erect: inflorescence corymbosely racemose. 
? Gartenflora 43237. 
