638 PROCEEDINGS OP THE AMERICAN ACADEMY 



BIGELOVIA DC. excl. §3. (Chrysothamnus Nutt., Benth. & 



Hook. Gen. PI. 2, p. 255.) 



§ 1. Diplostephioides Benth. & Hook. Involucrum pluriflorum, 

 cylindraeeura ; squamis- siccis latis obtusis spiraliter imbricatis : 

 corollas limbus 5-partitus ! lobis linearibus : appendices styli lan- 

 ceolate parte stigmatica breviores : achenia linearia. Frutices vel 

 arbusculse Andinre, habitu alieno : folia lanceolata penninervia 

 subtus tomentosa : capitula amplius corymbosa. 



1. B. hypolettca. Aplopappus hypoleucus Turcz. in Bull. Mosc. 

 1851, p. 177. Linosyris Mandonii Schult. Bip. 



2. B. fuliginea Baccharis fuliginea HBK., ex Benth. 



§ 2. Aplodiscus. Involucrum pluri-multiflorum campanulatum 

 vel turbinatum, in penultimis paucifloris angustum ; squamis 

 spiraliter imbricatis, i. e. seriebus verticalibus baud conspicuis : 

 corollae limbus 5-lobus : appendices styli aut triangulai'i-ovatas aut 

 subulato-lanceolatge parte stigmatica breviores : achenia brevius- 

 cula. 



* Aplopappoidece, foliis ssepius dentatis lobatisve ; involucri squamis 

 apice herbaceo notatis. 



3. B. veneta. Baccharis veneta HBK. Nov. Gen. & Sp. 4, p. 68. 

 Aplopappus (Aplodiscus) discoideus DC. Prodr. 5, p. 350. Linosyris 

 Mexicana, Schlecht. Hort. Hal. p. 7, t. 4. — Mexico : approaches the 

 borders of the United States, but apparently not found within. 



4. B. Menziesii. Foliis oblanceolatis spathulatisve rigidis parce 

 argute dentatis nunc pinnatilobatis ; capitulis pauciusculis glomeratis ; 

 involucri 12-20-flori squamis obtusis; acheniis fere linearibus sub- 

 coin pressis. — Pyrrocoma Menziesii Hook. & Arn. Aplopappus (Aplo- 

 discus) Menziesii Torr. & Gray. Linosyris dentata Kellogg, Proc. 

 Calif. Acad. 2, p. 16? — California to Arizona. Very near the fore- 

 going, and- probably passes into it. The most tangible differences are 

 that the scales of the involucre in B. veneta are more or less acute, 

 aud the achenia -shorter and turbinate. 



5. B. coronopifolia. Ramis gracilioribus ; foliis punctatis pin- 

 nato-3 - 7-partitis, segmentis (setaceo-mucronatis) rhachique angusto- 

 linearibus nunc fere filiformibus ; capitulis pauciusculis glomeratis ; 

 involucri 10-12-flori squamis obtusis \ acheniis subturbinatis. — Lino- 

 syris coronopifolia Gray, PI. Wright. 1, p. 96. — Texas, and along the 



