FLORA BOREALI-AMElilCANA. 



Cl. I. DICOTYLEDONE^. 



SuBCL, I. THALAMIFLOR^. DC. 



L 



Ord. L RANUNCULACEiE. Juss. Da 



1. CLEMATIS. 



Involucrum nullum aut calycifortne sub flore. Sepala 4-8, colorata^ Petcda nulla aut 

 sepalis breviora, Cariopsides plurimas in caudam saepius barbato-plumosam productse. 

 Radices perennes. Folia exacte opposita. DC. 



1. C Virginiana; scandens, floribus paniculato-corymbosis divisis, foliis ternatis foliolis 

 cordato-ovatis acuminatis sublobatis grosse serratls.— Zmw. Ammn. Acad. v. 4. p. 275. 

 Mich. Am.. V. I. p. 318. Pursh, Fl. Am. v. 2. p. 384. BigeL Fl. Bost. ed. 2. p. 219. Elliott, 

 Carol. V, 2. p. 44. De Cand. Prodr. v. J. p. 4. 



Stamina sepalis breviora. In floribus foemineis Jilamenta subulata abortiva adsunt, antheris minutis 

 vacuis. Folia subtus pilosa, semper ternata, foliolis majusculis, ssepe duas vel tres uncias longis, in planta 

 Doug^Iasiana multo minoribus, vix uuciam longis. 



Hab. Grassy or shrubby banks of rivers, from the United States to lat. 53o, disappearing about the south 

 end of Lake Winipcg. Drummond. Banks of the Columbia. Douglas. — This has been long cultivated in 

 England, where it provQS a hardy plant, well adapted for covering walls and arbours. Its flowers are highly 

 fragrant. 



2. C. Doitglasii; caule erecto simplici unifloro, flore nutante, foliis pilosis bi-tripinnati- 

 fidis, laciniis linearibus obtusiusculis. (Tab. L) 



Caulis herbaceus, pedalis, erectus, simplex, striatus, foliosus, parce pilosus, ad nodos lanuginosus, basi 

 squamis membranaceis fuscis tectus. Folia opposita, inferiora etiara connata et subvaginata, quadripolli- 

 caria, circumscriptione late ovata, e basi usque profunde bi-tripinnatifida, pilosa, ad divisuras segmentorum 

 lanuginosa, segmentis primariis semper exacte oppositis, remotis, et fere petiolatis, reliquis alternis; omni- 

 bus linearibus, obtusiusculis; foliorum inferiorum latioribus, superiorum sensim angustioribus. RacJiis 

 gracilis, petiolum semulans. Pedunculus terminalis, solitarius, tomentosus, uniflorus, Flos majusculus, 

 cernuus, subcylindraceus, basi obtusus. Sepala 4 vel 5, sesquiunciam longa, coriaceo-raembranacea, oblonga, 

 obtusiuscula, erecta (quoad axin floris,) apice solummodo patentia, intus glabra intense purpiu-ea, extus 



VOL. I. 



