42 Engelmann and Gray, 
clivity of sandstone hills near Industry. May—June. Rays 
yellow, turning white when fading. 
268 & 269. Senecio amputuacevs, (Hook.): annuus vel 
biennis; caule erecto fistuloso striato superne ramoso ; foliis 
inferioribus obovato-spathulatis in petiolum decurrentibus, 
superioribus ovato-lanceolatis acutis basi subcordata semiam- 
plexicaulibus, omnibus subintegris vel denticulatis; cyma co- 
rymbosa ; pedicellis apice demum incrassatis ; involucro squa- 
Mis setaceis paucis calyculato; radiis 7-9; acheniis strigoso- 
canescentibus. 
Var. « GLaBerrimus (No. 268): caule foliisque angusti- 
ortbus subintegerrimis glabris. Wet prairies. 
Var. 8 FLoccosus (No. 269): caule foliisque junioribus 
latioribus cano-floccosis; superioribus e basi latiore acumina- 
tis, nunc grosse repando-dentatis. — Sandy prairies in loose, 
dry soil. April. Both forms are certainly annual or biennial. 
270. Lycopesmia apHyLua, 8 Texana, Torr. & Gr. FI. 
Il. p. 485. Prairies. June—July. Roots penetrating deep 
into the soil. Some of the radical leaves are runcinate-pinna- 
tifid, with subulate lobes. 
271. Pyrruoparpus GRANDIFLORUS, Nutt. Prairies, near 
San Felipe. April. Perennial; the slender perpendicular 
root enlarging, at the depth of a few inches, into an oblong 
tuber, similar to the root of Cynthia Dandelion. Scapes 
several from one root, with or without a bract in the middle. 
272. Ascuepias (Orarta) LinpHEIMERI (7. sp.) : caudice 
perpendiculari incrassata caulem herbaceum pubescentem 
singulum erectum (vel plures adscendentes) emittente ; foliis 
oppositis ovatis obtusis (aut rarius lanceolatis) basi nune sub- 
cordatis breviter petiolatis utrinque puberulis; pedunculis 
brevissimis lateralibus ; pedicellis gracilibus pubescentibus 
corollz laciniis acutiusculis subduplo longioribus ; cucullis ad 
apicem sensim dilatatis subtrilobatis; processu bifurco, ramo 
altero brevi incluso recto, altero longiore incurvo exserto; 
folliculis ovato-lanceolatis acuminatis puberulis carina exteriore 
setulis mollibus pl. m. conspersis. — Black, clayey soil, near 
