Amminee.] LXXX. UMBELLIFERJE. 889 
Petala ovata, acuta, subplana v. leviter incurva, integra. Discus: stylopodia parva; styli 
breves. Fructus ovatus, a latere compressus, commissura angusta didymus, basi pro- 
funde emarginatus ; carpella tereti-5-gona, maturitate ineurva ; juga primaria prominentia, 
 &qualiter obtusa, basi curvata ; vitte ad valleculas solitarie. ^Carpophorum 2-partitum. 
Semen transverse subteres, facis rarius leviter concavum.—Herba annus, habitu foliisque 
dissectis segmentis. filiformibus 4pio leptophyllo similes. Umbelle composite, pleraque 
oppositifolie, sessiles v. breviter peduneulatz, pauciradiate.  Involucra et involucella 0. 
Species 2, Americse boreali-occidentalis incole.  W'aip. Rep. ii. 498. Torr. Bot. Mex. Bound. 
Surv. t. 28.—Genus ab Zpio, sect. Euapio, paullulum differt carpophoro 2-partito, ab. Oreosciadio 
habitu, ab utroque fructu basi auriculis rotundatis emarginato. 
91. Oreosciadium, JWedd. Chlor. And. ii. 203. 1. 69. (Apii sect. Oreoseiadium, DC. 
Prod. iv. 101.  Niphogeton, ScAlecht. in PL. Lechl. Exs.)— Calycis dentes obsoleti. 
Petala ovata, acuta, concava v. breviter inflexa, ob costam haud impressam integra. 
Diseus : stylopodia depressa tenuia v. breviter conica. Fructus ovatus v. breviter oblongus, 
a latere compressus, ad commissuram sepius constrictus ; ; earpella 5-gona, facie plana v. 
éonvexa; juga primaria squaliter prominentia obtusa; vittz ad valleculas solitarig. 
Carpophorum 2-partitum. Semen subteres v. a dorso compressum.— Herbs» perennes, 
glabrz, caudice czspitoso nune indurato. Folia indivisa, lobata v. ternatim decomposita. 
Umbellz composite, densz, subirregulares. Involueri et involucellorum braetez co, in- 
zquales. Flores albi. 
Species 3 v. 4, Andium Americz australis incole. T. B. et K. Nov. Gen. et Sp. t. A21 (Apium). 
—Üenus ab Apio carpophoro, a Caro petalis,ab utroque habitu differt. Species genuinsz sunt 
O. Lisguila, Wedd., e& O. montanwn, Wedd. |.O. dissectum, Wedd., anomalum 'est, fructu fere 
Seselios a latere vix compresso, jugis lateralibus crassioribus, et semine a dorso compresso, facie 
concaviusculo. 
52. Cicuta, Linn. Gen. n. 354.—OCalycis dentes acuti. Petala latiuscula, acumme in- 
flexo, ob' costam superne intrusam emarginata.  Diseus: stylopodia erassiuscula, de- 
pressa, integra. Fruetus late ovatus v. latior quant" longus, a latere subcompressus, ad 
commissuram consírictus, didymus; earpella a dorso compressiuscula; juga primaria 
crassa, obtusissima, lata, epicarpio membranaceo szpe solubili; vittz ad valleculas angus- 
tas solitarie. ^ Carpophorum 2-partitum. Semen subteres v. a dorso compressiusculum, 
facie plano-convexum.—Herb: perennes, elate, glabre. Folia pinnata v. pinnatim decom- 
posita. Umbelle compositz, oc-radiate. Involucri bractee pauce v. 0, involucellorum - 
oo, parvi. Flores albi. 
Species 8,in loeis paludosis aquaticisrve hemispherii borealis utriusque orbis crescentes. DC. 
Prod.iv. 99. — Reichb. f.-Io. Fl. Germ. t. 1853. 
53. Ammi, Lian. Gen. n. 934.— Calycis dentes obsoleti v. minuti. Petala latiuscula, 
acumine induplieato, ob costam superne intrusam marginesque superne dilatatos sub- 
2-loba. .Discus: stylopodia depressa v. brevissime conica, integra; styli longiusculi. 
Fructus ovatus, a latere eompressus v. ad commissuram constrictus, *didymus ; carpella 
5-gona; juga primaria prominentia, subzqualia, obtusa; vittz. ad valleculas solitarim. 
Carpophorum 2-partitum. Semen subteres v. facie Dinainécu um v. leviter concavum. 
—Herbs.biennes v. perennes, erectz, ramoss, glabrz. Folia ternato-pinnatim decom- 
posita, segmentis ultimis eartilagineo- v. arguto-serratis. Umbelle composite, oo-radiate. 
Involueri bractesz co, 3-secte v. rarius integra, involucellorum oo, integre. Flores albi. 
Species 6 v. 7 in Europa, Regione Mediterranea, ins. Canariensibus v. Azoricis crescentes, ..D C. 
Prod. iv. 112 (excl. 4. daucoide quod Ammiopsis, et A. cicutaria quod verisimiliter Oreosciadium). 
Reichb. f. Ic. Fl. Germ. t. 1864. Sibth. Fl. Gr. 1. 273. Guss. Pl. Rar. 1. 25. 
- Genus a Cari sect. Petroselino, imprimis bracteis involucri distinctum. ' In A. Huntii, H. Wats., 
ex ins, Azoricis, calycis dentes minute prominuli, in cxteris obsoleti. —.Peiroselinum trifoliatum et. 
P. Seubertianum, H. Wats., ex ins. Azoricis potius ad Ammi quam ad Pefroselinum (id quod jam suspi- 
eatus est auctor) referenda videntur. Involüeri braótem ut in priore oo, etsi indivise. In specie 
inedita ex ins. Capitis Viridis calycis dentes uf in 4. Huntii minute prominuli, involucra et fructus 
omüino 4mmeos, sed folia hirsuta ; segmentorum lobis dentibusqué obtusis fere Cherophylli. 
