310 . COMPOSIT.E. 



[Itudbeckia. 



in Upper Louisiana. It is a span or more hi-h. Mr. Douglases specimeu is considerably larger and stouter 

 in all Its parts; the leaves almost tapering into a petiole, and the upper oues so much smaller than the lower 

 that the flowers seem to be arranged in a leafy spike. * 



Tab. CVJI. Iva axillaris. Fig. 1, Leaf and flower; Jig. 2, Flower; Jig. 3, Male floscule, with its palea: 

 Jig. 4-, Female floscule, with do.; fig. 5, Achenium ;~7nagnified, 



Subtrib. II. Helianthe^. Capitula, si heterogama^florihus marginaUhus, nniserialibtis, 



coroUasqiie Ungulatis gerentibus; reliqids ^ ; minquam dioica vel monoica, Rachis 



bracteolata, aut rarissime in centra ebracteolata. Pappus aut aristatus aiit irregularis 



^ aut obsoktus aut coroniformis aut nullus. Antherw nigricantes, ecaudatcB. Styli rami 



stspissime com acuta aut appendiculo llneari superantur aut ubi truncati sunt apicmque solo 



pennicillati, ibi achenia calva aut aristata, aut manifeste obcompressa aut cojnpressa. Less. 



1. Heliopside^. Acheniis ecorticatis, exalatis, semper erostribus, calvis, aut pappo cor- 



oniformi coronatis ; capituUs homogamis autplerumque heterogamis, floribus marginalibus 

 fiemineis. Less, 



m 



27. HELIOPSIS. Pers. 



Radius iiniserialis. Achenium angulatc-compressum, omnino calvum, glabrum, disco 

 epigyno parvo.— Heibaj Americana!; Mik oppositis, integrisvelpinnatifidis; capitulis luteis, 

 sohtariis, ramos svperne aphyllos terminantibus ; involucris imbricatis ; rachide conica. Less. 



1. H.scabra; foliis breve petiolatis ovatis trinervibus grosse serratis apice inte.rerrimis 

 utnnque scabns, involucre pubescentl— Z)««. in Mem. du Mus. v. 5. p. 57. " 



Had. Common on the banks of the Red River, near the " Forks." Douglas.-The.e specimens agree 

 with ongmsi ones of II. scabra m my Herbarium, from the Bot. Garden of Montpellier; still I fear it differs 

 from H. Imvis, Pers., only in the more scabrous leaves and more downy involucres. 



2. H.? balsamorhiza ; subpubescens, foliis radicalibus plurimis petiolatis pinnatis pinnis 

 subpinnatifidis incisis, involucri foliolis numeresis lanceolato-acuminatis imbricatis caulem 

 paucitoliatum subcBqiiantibus, radice crassa balsamifera. 



Had Common on the gravelly banks of the Columbia, neai- Fwt Vancouver. Douylas.-" The root of this 

 plant . Ion,, th:ck, subfusrform, woody, and yields a copious limpid juice, not unlike the resin from Pinus 



2h rr TT"^ " T7 "^r^^-^-^^" o-^o--- ■ The leaves are mostly radical, 6-8 inches long, 

 M^th a heathmg base, and about equal .n length with the stem, or almost scape, for it bea;s but one or two 

 pair of leaves smaller than those of the root: young achenia compressed and four-anWed quite destitute of 



Sit i fotal v7ff Tr " ^"7 '"""'.*" "'"' ' "°"''^ P™!"'^'^ "'«"-"■<' «f halsamoM^a. The 



3. Hfterebinthacea; pubescens, foliis radicalibus petiolatis ovato-lanceolatis sinuato- 

 p.nnat.fid.s crenato-serratis, involucri foliolis numeresis lanceolato-acttminatis imbricatis 

 caulem paucifoliatum subaequantibus, radice crassa balsamifera. 



QX^T^-^yTrZ " ^""l Vancouver, on the Columbia, and in the grounds of the interior. Boughs.-. 

 Closely alhed to the precedmg spec.es, and yielding in its root the same terebinthine juice. 



2. RuDBECKiE*. Acheniis ecorticatis, erostrihus, calvis aut pappo coroniformi integro coro- 



natis; capitulis radiatis, radio neutro miser iali. Less. 



