642 PROCEEDINGS OF THE AMERICAN ACADEMY 



ing and following species, are disposed to form 4 or 5 vertical ranks, 

 in the manner of the next section. 



15. B. Parryi. Suffrutescens, spithamasa ad pedalem, primum 

 sublanata, mox glabrata ; ramis tantum tenuiter lanato-dealbatis vir- 

 gatis ad apicem usque foliosis ; foliis linearibus (2-4 poll, longis lin. 

 1-2 latis) basi attenuatis plerisque trinerviis ; capitulis in thyrsum 

 angustum vel spiciformem foliosum congestis foliis fulcrantibns plerum- 

 que longius superatis ; involucro 10 - 15-floro, squamis lanceolatis 

 attenuato-acuminatis pauciseriatis nudis, ektimis bracteantibus sgepius 

 folioso-appendiculatis ; corolla? tubo hirsutulo. — Linosyris Parryi 

 Gray in Proc. Acad. Philad. 1863, p. 66. — Rocky Mountains of 

 Colorado in the region of South and Middle Park. Heads rather 

 numerous, shorter than in the two foregoing, only 6 to 8 lines long. 

 Alveoli of the receptacle short and nearly entire. 



§ 4. Chrysothamnus. ( Chrysothamnus Nutt. excl. sp.) Involu- 

 crum 5-florum, angustum ; squamis siccis carinatis pentastichis 

 (raro tetrastichis), uempe in seriebus verticalibus strictis 5 

 (rarius 4) imbricatis : corolla? limbus angustus aut breviter aut 

 profundius 5-lobus : appendices styli elongato-subulata? vel fili- 

 formes hispidula?, parte stigmatica lineari sa?pius longiores : ache- 

 nia angusta, linearia : pappi seta? tenues : folia angusta integer- 

 rima. 



* Achenia glaberrima, 4 - 6-angulata, disco epigyno lato : involucri 

 squama? acuminata? eximie pentasticha?, in utraque seriei verticali 

 5 - 6 : capitula majuscula (ultra semipollicem longa), corymbu- 

 loso-conferta : corolla? lobi breves : pappus corolla longior. 



h- Frutices ramosissimi ultrabipedales, ramis rigidis gracilibus 

 scopariis. 



16. B. Bigelovii. Subcinerea; ramis junioribus dealbatis ; foliis 

 marginibus revolutis filiformibus ; involucri squamis chartaceis conco- 

 loribus modice carinatis appressis, exterioribus oblongo-lanceolatis 

 lanoso-ciliatis acutiusculis, interioribus angustioribus plerumque acu- 

 minatis ; pappi setis vix rigidulis. — Linosyris Bigelovii Gray in Bot. 

 Whippl. p. 42, t. 12. — Above Albuquerque, New Mexico, Dr. J. M. 

 Bigelow, and probably at a station farther north, Dr. Parry: Huefano- 

 plains, Colorado Territory, E. L. Greene. Notwithstanding the itera- 

 tion, no objection will be taken, I trust, to continuing the dedication of 



