78 PLANTiE WKIGHTIANiE. T. 



figure was made, in the collection 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 to 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 aestivation. 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 tubercles, just as in Philadelphus. From the want of sufficient flowers I 

 was obliged to use both Wright's 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. Wright's recent collection agree with his former ones in 

 their more rigid habit, and in the smaller, more crowded, revolute leaves, canescent 

 underneath ; — 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. 



UMBELLIFERiE. 



230. Eryngium Wrightii (sp. nov.) : glauco -pallidum ; caule erecto apice cymo- 

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

 fidis dentibus triangulatis apice setiferis, caulinis sessilibus pinnatipartitis segmen- 

 tis lineari-lanceolatis cuspidatis, superioi-ibus sensim abbreviatis fere palmatiformi- 

 bus, nempe segmentis confertis infimis subulatis parvis cseteris elongatis trifidis, in- 

 volucralibus capitulo ovali duplo longioribus cuneato-lanceolatis trifidis cum 2-3 

 minoribus linearibus integerrimis ; paleis subulatis corneis flores superantibus, sum- 

 mis 2-3 s^pius foliiformibus capitulum coronantibus ; calycis lobis ovatis mucro- 

 nulatis. — Bed of the Limpia or Wild Rose Creek ; Aug. Also in the coll. of 

 1851. "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 rigid 

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

 eri. It is more related to E. heterophyllum, Engelm. in Wisl. Mem. N. Mex., from 

 Cosiquiriachi.* 



f E. HooKERi ( Walp. Repert. 2. p. 389) : annuum ; caule erecto paniculatim poly- 

 cephalo ; foliis inferioribus basi semivaginante subpetiolatis trisectis, segmentis 

 lateralibus 3 - 5-partitis lobis lanceolatis pinnatifido-laciniatis spinulosis, terminali 



* Eryngium Beecheyanum, Hook. ^ Am., is apparently a dwarf state of E. comosum, Laroche. 



E. filiforme, ShuUleworLh, PI. Rugel, must be a mere variety of E. Baldwinii, Spreng. : his E. fili- 

 forme, var. latifolium {Rugel, No. 180, 181) is just the E. gracile, Baldw., according to the specimens in 

 the Hookerian herbarium. 



E. prostratum, Natt. is most likely a distinct species, and the E. Americanum of Walter. 



