204 REVISION OF THE GENUS SANGUISORBA. 
River of Louisiana, 1853, p. 280, t. v.  Poteridium annuum, Spach in 
Ann. Se. Nat. 3 sér. tom. v. p. 43. Sanguisorba occidentalis, Nutt. 
msp. sec. Torr. et 
Herba secundo anno florens, gemmis in axillis foliorum radicalium 
ortis perennans, vegetatione terminali i.e. axi primaria in sureulum 
floriferum excrescente. Surculus e basi rosulam foliorum radicalium 
gerente progrediens erectus, multifolius, ramosus, ramis axi primaria 
brevioribus. Folia glabra (in planta juvenili ad rachin pareissime 
pilosa), pallide viridia, subglaucescentia, wtate pallide rufescentia vel 
luteo-fuscescentia, radicalia et caulina imparipinnata, 5—7-juga, foliolis 
pectinato-pinnatipartitis (in planta juvenili pinnatifidis), segmentis 
utrinque 3—7 (posterioribus anteriora numero superantibus) linearibus 
acutiusculus. Stipule adnatze, in foliis radicalibus vaginam elongatam 
integram, utrinque dente inconspicuo terminatam, in foliis caulinis 
brevem bilobam, lobis recurvato-patulis margine superiore (more folio- 
lorum) pectinato-partitis, formantes. Spice densiflore (in surculo 
primario et ramis majoribus) oblonge, eyliudrieze vel (in ramis et ra- 
mulis minoribus) capituliformes, ees Florescentia adscendens, 
floribus infimis nonnunquam tardivis. Flores omnes hermaphroditi, 
albo-virescentes. Bractez flore mes breviores, occulte, latissime 
ovatee, obtuse, concave et subcarinate, basi utrinque paullulum ac- 
currentes, bracteolas et tubum calycis amplectentes, scariosæ, albo- 
hyalinz, uninerves. Bracteole (prophylla) bracteis similes, minores, 
basi nervo brevissimo mox evanescente instructe. Calycis lobi late 
oblongi, late albo-marginati, medio virides, obtuse apiculati, apiculo 
rufescente, post anthesin reflexi. Stamina constanter 2 !, lobis caly- 
cinis interioribus (lateralibus) opposita, exserta. Filamenta filiformia ; 
antherze breves, luteo-albze, subfuscescentes. Carpidium unicum, stigmate 
breviter penicillato albo. Tubus calycis fructifer coriaceo-induratus, 
. sublignosus, ovatus, utrinque attenuatus, alato-quadrangularis, alis 
crassiusculis acutis, faciebus medio reticulatim, margine transverse ru- 
gosis, rugis alas intrantibus. (Dispositio foliorum 3, in spicis 12. 
Species valde singularis, primum in horto Dresdensi culta, orta e 
seminibus plant a cl. Geyer in Oregon lectz, cujus locus natalis a col- 
lectoris his verbis indicatur: “ Loamy, stony, sunny watercourses, 
Spokan highlands, with Hosackia Purshiana. The seedling plants have 
tawny-coloured leaves in the winter." (No. 4 
Sanguisorba annua, Nutt., quam dubiis quidem vexatus, tandem sine 
