78 



PLANT^ WRIGHTIANiE. 



V. 



/ 



figurc was made, in the coUcction of 1851. — This very remarkable new genus, 

 which is more nearly related to Deutzia than to any other, fully confirms the view I 

 took, in the Flora of North America, in uniting Philadelphus fb the Saxifragacese. 

 The few flowers I have seen being open, I know not whether the petals are convo- 

 lute, but their form forbids their being valvate, in sestivation. The pods dehisce 

 septicidally, splitting at the apex, first usually into two lobes, each of which soon 

 divides in the same way. The surface of the hairs of the leaves is scabrous with 

 minute tubcrcles, just as in Philadelphus. From the want of sufficient flowers I 

 was obliged to use both Wrighfs and Lindheimer's specimens in the plate. I sup- 

 pose the two are only varieties, but they may belong to distinct species ; for the 



fruiting specimens in Mr. Writ^ht 



their more rigid 



:ction agree with his former 

 crowded, revolute leaves. a 



undcrneath ; — a difference which may be owing to a more arid station. In the 

 flower furnished by Lindheimer, the anthers are tipped with a longer cusp than in 

 our figure. Be this as it may, Dr. Engelmann and myself rejoice in the opportuni- 

 ty of dedicating such an interesting and well-marked genus of our Texano-New- 

 Mexican region to Mr. Augustus Fendler, who, next to Wislizenus, was the earliest 

 botanical explorer in New Mexico, where he made with much hardship the excel- 

 lent collection now so well known to botanists. 



UMBELLIFEEiE. 



apice cymo 



230. Ery^-gtum Wrightii (sp. nov.): glauco-pallidum ; caule erecto 

 so-polycephalo ; foliis rigidis, radicalibus oblanceolatis pectinato-dentatis vel pinnati 

 fidis dentibus triangulatis apice setiferis, caulinis sessilibus pinnatipartitis segmen 



pidatis, superioribus sensim abbreviatis fere palmatiformi 



lineai 



bus, nempe segmentis confertis infimis subulatis parvis c^teris elongatis trifidis 

 olucraHbus capitulo ovali duplo long 



trifidis cum 2-3 



mmoribus linearibus integerrimis ; paleis subulatis corneis flores superantibus, sum 

 mis 2-3 ssepius foliiformibus capitulum coronantibus ; calycis lobis ovatis mucro- 



^o -f ■ ~^'^ ^^ *^^ ^'"^^'^ ^" ^'^^ ^^'^ ^^^^^ ' ^^g- ^^«o in the coll. of 

 18d1.^ «Flowers light blue." Stem one or two feet high, from a long, apparently 



biennial root. Uppermost involucriform cauline leaves closely sessile, and almost 

 palmately.parted. Heads 3 to 5 lines in diameter, shorter than the close and ridd 

 myolucre, pale, most of them inconspicuously coronate in the manner of E Hook- 



ColiqSrbcM *' ''^'^'^ '' ^' ^''^^'^P^>^^^^^™' ^'^^'^^- i^ ^^i^i' Mem, N, Me.r., from 



ol^{ ^7 r'''' ^ ^Y'>.y''-'- 2- ^' 389) : annuum ; caule erecto paniculatim poly- 

 ?:ij./f ''. infenoribus basi semivaginante subpetiolatis trisectis, segmentis 



alibus 3 - 5-partitis lobis lanceolatis pinnatifido-laciniatis spinulosis. terminali 



No 



£>• 



rorL vafl , T f ;r *,' ^- ^""'' '""''""' " ""'= '™'y "f E. Baldwinii, Sprel 



the Hookerianherbarium. 



E. prostratum, Nutt. is n,ost llkely a distinct species, and the E. Americanum of Walter 



his E. fili- 



in 



