420 
BOTANY. 
Pkosopis ^ PUBESCENS, Beiitli. {Stroinhocarpa, Gray. Plant. Wright. 
1. 60.) A shrub 6-20° liigli ; stipiilar spines in pairs, sliort ami straight ; 
pinn;r 2, with 4—10 pairs of coriaceous oblong leaflets, 3-4'' long, subpubes- 
cent beneath and on the petioles ; peduncles axillary, shorter than the 
leaves ; flowers in cylindrical spikes, 1-2' long ; calyx and petals yellowish 
appressed-silky externally ; petals about 1" long ; stamens and style exsert; 
ovary short-stipitate ; pod closely spiral, 1-2' long, cinereous-pubescent when 
young. — The screw-bean" of New Mexico and Arizona; Southern Nevada, 
(Fremont ;) Southern Utah, (Palmer.) 
Peunus minutiflora, Eng. Plant. Lindh. 185. A shrub 1-6^^ high, 
densely branched, subspinescent, glabrous with the young branchlets puber- 
ulent ; leaves fliscicled, small, 3-9" long, oval or obovate (or oblong-spatu- 
late,) attenuate to a short glandless petiole, very obtuse or acutish, entire or 
sparingly denticulate, more or less coriaceous, glabrous or somewhat puberu- 
lent when young ; stipules very minute ; flowers solitary, li" long, subses- 
sile, the calyx turbinate; stamens 10-15, in 2-3 rows ; fruit globular, 4-6" 
in diameter, more or less tomentose ; the flesh thin and dry, narrowly 
grooved on the ventral suture, separating from the globose smooth and even 
stone, the sutures of which are but slightly ridged and grooved and the sides 
not at all compressed. — ^Very near P. Andersonii. "Western Texas, New 
]\Iexico, and Southern Utah, (Palmer.) 
Page 82. Rubus steigosus, Mx. Labrador, (Rev. S. R. Butler.) 
Page 83. Cercocakpus ledifolius, Nutt. Southern Utah, (Palmer.) 
Page 93. Saxifraga cespitosa, L. Labrador, (Butler.) 
Page 97. Parnassia parviflora, DC. Labrador, (Butler.) 
' PROSOPIS, L. Flowers S-parted, nsnally sessile. Calyx campanulate, short-dentate. Petals 
connate helow the nuddlc or at length free, vulvate. Stamens 10, free, shortly exsert ; anthers tipped 
w ith a ilccidnon-- jiland or rarely ^landless. Ovary sessile or stipitate, niauy-ovnled ; style filiform; 
stij^uia tei ininal. small. Pod linear, tliiek-conipressed or subterete, straight, falcate, or varionsly twisted 
coriaei'ons, indehiseent, the exoearp thin or coriaceons, mesocarp tliick and spongy, hardly or rarely 
thin, eiidoi^arp eartil:iu,inons or yvapyraeeons, eontinnons Avith tlie so])ta between the seeds and some- 
tinu's en\N rajipiui; them; pod rarely snbi ontiniunis within. Setsds nsnally ovate, compressed. Trees or 
shrnbs. prickly, unarmed, or having solitary or geminate axillary spines or spineseent stipnl(;s ; leaves 
bi]iinnate, jiinnic nsnally 1-2 jiairs, leaflets few-many pairs, often rather rigid ; stipnles and "lainls small 
or none ; ilnwers small, iu cylindrieal sjiikes or rarely in globose heads, pednncles axillary. Bi:\tii & 
Hook. Onr North American species belong to the following sections, having the petals woolly at 
apex and the ov ary villons: — 
v> Ai,(;.u;oiiiA. Heiifh. Pod elongated, nsnally falcate, flat or snbterete, eontinnous and moniliform 
or subjoint(Ml. Spiny trees or shrubs, with cylindrical, spikes. — P. ra. \n lu i < \. Torr 
v> Str. A!riO( Ai;i'A. llmtb. r...l spirally twisted, with spongy niesuearii. endocarp sometimes thin. 
Shrnbs with spiuesr.-nt si ipul, -. and globosc, oblong or cylindrical spikes.— P. ruBESCExs Benth and" 
P. cinei:a-ci:ns il. A. ' ' 
