230 PROCEEDINGS OF THE AMERICAN ACADEMY 



Go. G. rigidula, Benth.l. c. G. glandulosa, Scheele, I. c. Flowers 

 bright blue, showy, according to Lindheimer opening widely only 

 in direct sunshine late in the afternoon and closing at sunset. — Texas 

 to Arizona and Mexico. 



Var. acerosa. Rigidior ; ramis e basi magis lignosa ad apicem 

 usque crebre foliosis, segmentis foliorum plerisque suhulatis vel acerosis 

 subpungentibus ; pedicellis flore quandoque brevioribus. North New 

 Mexico to Arizona, Fendler, Gordon, Wright, &c. 



4. POLEMONIUM, Tourn. 



Corolla ab infundibuliformi ad rotatam. Stamina basim versus 

 corolla? aaqualiter inserta: filamenta elongata, soepissime declinata, basi 

 pi. m. piloso-appendiculata. Ovula in loculis2-12. Semina hume- 

 facta tegumento mox mucilaginosoet spirillifero modo Collomice. Calyx 

 magis quam in Gilia herbaceus, sub sinubus vix scarioso-membrana- 

 ceus, post anthesin accrescens, lobis muticis. — Herba? perennes rhizo- 

 matibus gracilibus, raro annua? ; foliis semel pinnatis vel pinnatiparti- 

 tis ; floribus creruleis violaceis seu albis. 



§ 1. Corolla infundibuliformis calycem superans, tubo saapius elon- 

 gate Filamenta basi vix dilatata tantum hirsutiuscula. — Pe- 

 rennes, nanae e rhizomate repente, viscido-glandulosoe, moschatae, 

 foliolis perplurimis minimis confertis. Transitus ad Giliam. 



1. P. confertum, Gray, Proc. Acad. Philad. 1863. Spithamaaum; 

 foliolis 3-5-sectis secus rhachin quasi verticillatis vel fasciculatis, seg- 

 mentis aut late ovalibus aut lineari-oblongis ; floribus (mellium spiian- 

 tibus) capitato-congestis nutantibus demum racemoso-spicatis ; calycis 

 lobis angustis tubo cylindraceo seu oblongo plus dimidio brevioribus; 

 corolla caarulea, tubo angusto-infundibuliformi calycem superante lobis 

 suis rotundatis 2-3-plo longiore. — Rocky Mountains from lat. 38° to 

 49°, Nuttall, Parry, Hall & Harbour, Lyall ; E. Humboldt Mountains, 

 Nevada, Watson ; and high sierras of California, Brewer. Corolla 

 9-12 lines long. 



Var. mellitum, Gray, 1. c. : laxius ; corolla pallida nunc alba polli- 

 cari, tubo angusto lobis quaduplo longiore. — Rocky Mountains, Hall 

 & Harbour, &c. Wasatch Mountains, Utah, Watson. 



P. viscosum, Nutt. PI. Gamb. Ilumilius; foliolis integerrimis 

 ovatis rotundisve ; floribus subcorymbosis ; calyce subcampanulato, 

 lobis latioribus tubo subaaquilongo corolla) tubum (lobis suis baud longi- 

 orem) subaequantibus. — Rocky Mountains, about lat. 40°, Nuttall. 



