300 



COMPOSlTiE. [Hymenonema. 



14. H. umhellatum; caule erecto simplici vakle foliosOj foliis llneari-lanceolatis glabri- 

 nsculis dentatis integerriniisque, floribus subumbellatis, pedunculis pubescentibus, involucris 

 glabiis,— i««n. Sp, PL p. 1131. Engl Bot t 1771. Bich, in Frankl \sL Journ. ed. 2. 

 App. p. 29. 



Hab. From Lake Huron, Dr. Todd, to Fort Franklin, on the Mackenzie Eiver, in lat. G6o north, 

 abundant. Dr, Hickardson, Drumiaond. 



11. TROXIMON. Nnttan.an Gart.^ 



Jwf o/Mcrum duplex : ext e foliolis laxe imbricatis ovato-lanceclatis ; int e foliolis 10-12 

 sequalibus uniformibusj infra medium coadunatis. Beceptacidiim planum, nudum. Achenia 

 oblonga, compressa, in rostrum attenuata. Pappus pilosus seu scaber, pluriserialis. — Habitus 

 Scorzonerae sed folia omnino radicalia. 



1 



1. T. glaitciim; foliis lineari-ensiformibus acutis acuminatisve integerrimis dentatisque 

 glaucis, flore maxlmo flavo, corollae fauce valde piloso. — Njitt in Frazer's Cat 1813. 

 Pursh, FL Am. v. 2. p, 505. Bich, in FrankL Ist Journ. ed. 2, App. p. 29. — a. involucro 

 lanato. — ^. involucro glabro. 



Hab. From the Saskatchawan to the Prairies of the Rocky Mountains, and to the shores of the Arctic 

 Sea. Dr. Bichardson. Drummoud. — I suspect the T. cuspidatum of Pursh, (the marginatum of Nuttall,) 

 is merely a variety of T. glaucum. 



2. T. aurantiacmn; foliis oblongo-lanceolatis obtusis in petiohim longe attenuatis in- 

 tegerrimis sinuato-dentatisque, flora aurantiaco, corollae fauce vix piloso. (Tab. CIV.) 



Radix fusiformis, perennis. Folia plurima, omnino radicalia, erecta, glabra vel sublanata, membranacea, 

 oblongo-lanceolata, obtusa, in petioium longum plerumque purpurascentem attenuata. Scapus spithamseus 

 ad pedalem, erectus, teres, glaber, supeme soluramodo pnbescens. Flos terminalis, " aurantiacus" (Drum- 

 mont?), siccitate fere purpureus, erectus. Tnvolucrum hasi lanosum, duplex: int. e squamis 10-12 erectis, 

 lineari-ohlongis, sequalibus, obtusis, e basi ad medium coadunatis; ext. e foliolis vel squamis 5-6, lato- 

 lanceolatis, laxe imbricatis, erectis. Beceptaculum nudum. CorollcB numerosse, ligulata?, calycis foliola 

 excedentes, apice 5-dentatai : tubus glabriusculus, ad faucem vix pilosus. Achenium oblongfum, compressum, 

 leviter striatum, in rostrum attenuatum. Pappus e pilis numerosis, sequalibus, albissimis, sub lente scabris. 



Tab. civ. Troximon aurantiacum. Fig, 1, Floret; Jig. 2, Involucre; Jig. 3, Inner involucre; Jig. 4, 

 Achenium and pappus; Jig. 5, Section of the achenium: — more or less magnijied. 



Hab. Alpine Prairies of the Rocky Mountains. Drummond. — Whether this Genus be the same as 

 Troximon of Gsertner, I am unable to say, having no means of determining^. It is, I think, identical with 

 Nuttall's Troximon; hut that author describes the pappus a.^ plumose, yA\\c\\ is not the case in my plants, it is 

 only very minutely scabrous. The beak of the achenium, in either species, is not evident till the fruit is ripe. 



12. HYMENONEMA. Cass. 



Involucrum cylindraceum, foliolis imbricatis, appressis, ovalibus, acutis, coriaceis, mar- 

 ginibus membranaceis. Beceptaculum nudum. Achenium cylindraceum. Pappus e pills 

 paucis scabris jequalibus, basi membranaceo-dilatatis. 



1. H. 9 glaucum; foliis lineari-acuminatis canaliculatis glaucis. 



Hab. About Fort Vancouver on the Columbia. TV. Garry, Esq. — Of this there is only a single 

 specimen, and it appears to be unbranched. 



