OF ARTS AND SCIENCES: MAY 13, 1873. 645 



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numerous inseparable forms, of which the most marked deviations 

 from the general type are : — 



Var. glabrata. ( Linosyris graveolens var. glabrata Engelm.) Pri- 

 mum tomento tenui cinerea, mox glabrata viridis ; involucri squamis 

 sa?pius angustioribus subacutis ; corolla? lobis paullo longioribus. 



Var. latisquamea. Iuvolucri squamis latioribus obtusissimis ; 

 corolla? lobis brevissimis. — New Mexico, Dr. Bigelow, Dr. Henry. 

 Inner scales papery and glabrous, the short outer ones tomentose. 



Var. hololeuca. Undique cano-tomentosa, 'involucri squamis 

 angustis obtusissimis ; corolla? lobis brevissimis, tubo pilis parcis longis 

 arachnoideis instructo. — Owens' s Valley, interior of California, Dr. 

 Horn. (No. 2852, distrib. Brewer.) 



Var. albicaulis. Caule dense lanato ; foliis glabrescentibus ; in- 

 volucri squamis glabris obtusiusculis ; corollas lobis longiusculis, tubo 

 pilis crebris longis arachnoideis villoso. — Ckrysothamnus speciosus 

 var. albicaulis Nutt. 1. c. Linosyris albicaulis Torr. & Gray, 1. c. — 

 Rocky Mountains, Nuttall, Burke. In most flowers of the species 

 there is a variable amount of short and stronger hairs on the tube of 

 the corolla. In this they are peculiar for their length and cobwebby 

 character. Traces of the same I have now met with in some different 

 forms, notably in the preceding. The form of the corolla-lobes also 

 varies unconformably with other characters, being in some no longer 

 than broad, in others twice or thrice longer. 



23. B. Douglasii. Fruticosa, subpedalis ad orgyalem, fastigiato- 

 ramosa, glabra vel [scabro-puberula (nunquam lanosa) ; foliis aut an- 

 gustissime aut latiuscule linearibus lanceolatisve rigidulis ; capitulis 

 lin. 4-5 longis conferte cymosis ; involucri squamis oblongis seu la- 

 tiuscule linearibus obtusis ; corolla? limbo ad medium usque 5-lobo ; 

 appendicibus styli angusto-subulatis parte stigmatica dimidio breviori- 

 bus ; acheniis breviusculis deorsum angustatis ; pappo satis rigidulo. — 

 Crinitaria viscidijlora Hook. Fl. Bor.-Am. 2, p. 24. Ckrysothamnus 

 viscidijlorus & pumilus Nutt. 1. c. Bigelovia viscidijlora DC. Prodr. 

 7, p. 279. Linosyris viscidijlora Torr. & Gray, 1. c. — Colorado Ter- 

 ritory and Wyoming to the Sierra Nevada, California, Oregon, and 

 Washington Territory. In referring it back to Bigelovia, I venture 

 to give a new specific name for this widespread species, the original 

 one being misleading. For, although the involucre may occasionally 

 be viscid with a resinous or balsamic exudation, it appears to be more 

 generally free from it than any other species of the section ; and the 



