884 LXXX. UMBELLIFER.E. ( Amminee. 
36. Musenium, JVu//. in Torr. et Gr. Fl. N. Amer. i. 642.—Calycis dentes conspicui. 
Petala unguiculata, oblonga v. obovata, acumine sepius longo induplieato, ob eostam 
superne leviter impressam emarginata v. subintegra. Discus: stylopodia parva, depressa ; 
styli breves. Fruetus ovatus, a latere leviter compressus, commissura latiuscula ; carpella 
5-gona, a dorso compressa ; juga primaria filiformia, prominula, lateralia arcte contigua ; 
vitte oo. Carpophorum integrum v. 2-fidum. Semen a dorso leviter compressum, facie 
excavatum.—Herbz perennes, czspitose v. breviter ramoss, glabre. Folia pinnatim de- 
composita, segmentis pinnatifidis. Umbelle composite, oc-radialz. Involucrum 05; in- 
volucellorum bractez paues, setaces. Flores albi v. flavi. Fructus sepius asperatus v. 
murieatus. pericarpio (an semper P) adnato. 
Species 2 v. 3, Americw borealis incole.  W/alp. Rep.ii. 427. Bot. Mag. t. 1742 (Seseli). — 
Genus Vicatie valde affine, differt calycis dentibus magis evolutis, disco minore, fruclu exasperato, 
commissuralatiore. .M.£enuifolium, Hook. in Pl. Grey. Exs. n. 220, non Nutt., est Peucedani species. 
37. Trachydium, Lindl.in Royle, Illustr. 239.—Calyeis dentes patvi v. obsoleti. Petala 
ovata v. obovata, nune concava obtusa integra, nune acumine breviter inflexo el ob costam 
superne leviter impressam emarginata. Discus: stylopodia conica v. depressa, basi vix 
marginata. Feuctus ovatus, a latere corapressus, ad commissuram plus minus constrictus ; 
carpella a dorse compressiuseula v. subteretia; pericarpium membranaceum, laxum, jugis 
obtusissimis vesiculoso-rugosis papulosis levibusve; endoearpium membranaceum, laxurm ; 
ville ad valleculas 1-2, rarius 3. Carpophorum 2-partitum v. 2-fidum." Semen transverse 
semilunatum v. subteres, facie coneavum.—Herbe perennes v« rarius annuse, siope humiles 
etespitosseque, rarius elatiores. Folia subradicalia, pinnata, segmentis nune ovatis dentatis 
nune confertim dissectis. Umbellz compositi, primordialis nonnunquam caulem brevissi- 
mum terminans, radiis elongatis peduneulos umbellas simplices ferentes simulantibus ; late- 
rales in ramos elongatos s:spius minores. . Involueri bractes ssepius foliacez v. membra- 
nacez, dental: v. dissectee, involucellorum bractez oo, membranaces v. anguste, integre v. 
sepius dissecim. Flores (an semper?) albi. 
Species ad 10, quarum 7 Himalayan, Walp. Rep. v. 869; Jacquem. Voy. Bot. t. 79, plereque 
fructibus ad valleeulas 1-2-, rarius 3-vittatis, in una tamen (Hymenolena obtusiuscula, DC. Prod. iv, 
246), caulis primarius elatior, fructus major valleculis 2—-3-vittatis, et in altera Sikkimensi fructus 
parvus vittis obseuris. Species altera videtur planta in Alpibus Elamont ab Auchero lecta (n. 4626) 
fructu fere 7T. Royleani, sed specimina nostra vix perfecta. His addenda genera HAPLOSCIADIUM, 
Hochst. in. Flora, 1844, 20 ; Walp. Rep. v. 839, species Abyssiniea, habitu omnino 7. Hoyleani ot 
EnxEMopaucus, Bunge, Del. Sem. Hort. Dorp. ez ejusd. Rel. Lehm. in Mem. Sav. Etr. Acad. Petersb, 
vii. 316, species in aridis Bokharis et, Afghanistanise crescens, fructu vesiculis verruciformibus in- 
signi; et forte Hymenolena Candollei, DC. Prod. iv. 245, species inter Trachydium et Pleurosper- 
mum subintermedia. 
38. Arracacia, Bancr. in Trans. Agr. Hort. Soc. Jam. ex Linnea, iv. Litt. Ber. 13. 
(Arracacha, DC. Prod. iv. 243.) —Calyeis dentes parvi v. obsoleti. Petala lata v. ovata, 
acumine inflexo, ob costam vix impressam subintegra. Diseus: stylopodia conica, mar- 
gine undulato cineta. Fructus ovatus v. ovato-oblongus, apice sspe attenuatus, a latere 
compressus, ad commissuram consírietus ; carpella transverse subteretia v. 5-gona ; juga 
primaria prominula, óbtusa, dorsalia et intermedia lateralibus sepius magis elevata; vitto 
oO, sed sepe irregulares, nune paueze maxim: ad suleos seminis solitarie videntur. Car- 
pophorum 2-partitum. Semen subteres, facie profunde suleatum, marginibus sspe 
involutis.—Herb:e perennes, glabre v. minute puberule, sepe elatz, radice v. rhizomate 
interdum tuberoso eduli. Folia pinnata v. pinnatim decomposita, segmentis latis v. rarius 
angustis dentatis pinnatifidisve. Umbellie compositze, multi- v. rarius pauciradiate. Invo- 
lueri braetea foliacea, v. 0; involueellorum braetes oo, rarius foliaces, indiviss, sepius 
párve v. paues ad latus exterius umbellulz site. -Floresalbi (v. rariusflavescentesP). Pe- 
ricarpium totum a semine solutum v. endocarpium cum vittis semini adhzrens.. 
Species ad 12, Andium Ameriez australis, Mexici, et civitatum austro-occidentalium Ameries 
borealis ineolm. — DC. Prod. Le. Walp. Rep. v. 920. ' Bot. Mag.t. 8092. Hook. Exot. Fl. t. 
152 (Conium). .H. B. et K. Nov. Gen. et Sp. Amer. L. 420 (Conium). i E 
