- PETROMECON, 293 
but now in hand from desert regions adjacent in northern 
Arizona and southern Nevada and Utah, chiefly of Mr. M. E. 
Jones’ collecting. An anomaly in Zschscholtsia, by its pecu- 
liar habit and sculptured seeds. 
A New PAPAVERACEOUS GENUS. 
PETROMECON. 
Diminutive rigidly upright shrubs of dendroid habit with few 
stout densely leafy branches and solitary, pedunculate flowers in 
some axils and at the forks. Leaves alternate, dissected, but 
pedately, not pinnately. Calyx calyptriform, deciduous. Petals 4, 
deciduous. Stamens 80 or more; filaments very long, filiform 
above a flattened base; anthers much shorter, linear. Stigmas 
2 or 4, not greatly elongated, clavellate. Pod long and 2-valved 
but hard and subligneous, the valves fluted. Torus a hemi- 
spherical subligneous cup, bearing petals and stamens on a 
thickish corky elevated inner margin, the outer a mere thick 
herbaceous ring. Seeds with no superficial papery coat, appendage 
or reticulation, but the surface uneven by short interrupted 
subsinuous rugosities.—T' wo known species, inhabiting shelving 
rocks on the almost inacessible slopes of Guadalupe Island; 
having something of the habit of the dendroid insular Esch- 
scholtzias, but a pedatifid foliage, and flowers of Sty/ophorum, 
as to the excessive number of stamens on long filaments. The 
torus and the stigmas approach those of Zschscholtsia but are 
different, as are also the seeds. 
P. PALMERI. Eschscholtzia Palmeri, Rose, Contr. U. S. Herb. 
i. 23. Very robust, 2 to 4inches high including the 2-inch 
long pods, of compact and rounded dendroid habit, the spread 
of the few branches equalling the height of the plant: leaves 
fleshy, very glaucous, glabrous: calyptra almost spherical, with 
_ very short blunt point: corolla an inch wide, rotate, the broad 
petals overlapping below the middle: stigmas 2. 
