164 Hermann Wolff. — Umbelliferae-Sauaiculoideae. 



Pazifisches Nordamerika: Von Nord-Idaho durch Washington und Oregon 

 (Geyer n. 583) bis Central-Californien; blüht von JuH bis September. 



Nota. Habitum stirpis et modutn evolutionis cl. Geyer apud Hooker I.e. bis verbis descripsit: 

 >In April the young plants are wholly subinerged, and present the appearance of some articu- 

 lated Jmwci*s, tbe leaves, or rather the petioles, being similarly terete andjointed. On emerging 

 above tbe water these petioles expand into laminae at the top, retaining the jointed swollen 

 character in the costa. The radical petioles are 8 to 10 inches long. Those of the slem, in 

 Proportion as they are out of the water, become flattened and the margin spinuloso-ciliate.< — 

 E. articulatum et species afOnes eodem modo crescunt ut species gerontogeae E. eomiculatum 

 et E. Barrelieri. 



55. E. petiolatam Hook. Fl. bor.-amer. I. (183 4) 259; Torr, et Gray, Fl. North 

 Amer. I. (4840) 604, ex pte. (?); Coult. et Rose, Revis. N. Amer. Umb. (<888) 97 et 

 in Contr. U. S. Nat. Herb. VH. {. (1900) 53. — E. aquaticum Hook, et Arn. Bot. 

 Beech. Voy. (183 2) 4 42, sec. Ind. Kew. — E. petiolatum var. jundfolium Gray in 

 Proc. Amer. Acad. Vlll. (4 872) 385. — Gracile 30 — 50 cm altum. Caulis inferne 

 simplex vel remotissime raniosus, apice 3 — 4-furcatus, ramis semel vel bis cymose 

 divisis. Folia basalia pauca, erecta, vetustioru plerumque tanlum fistulas satis aniplas, 

 compressiusculas, supra zb canaJiculatas, superne anguste, ad basin versus sensim latius 

 alatas, nodoso-septatas, ad nodos setis singulis vel 2 — 3-nalis obsilas sistentia; f. serius 

 exorta apice petioli talius vel similis laminam parvam, anguste lanceolatam, longiuscule 

 acuminatam, subintegram vel ± profunde spinuloso-serratam, subparallelinerviam ferentia; 

 caulina et fulcrantia illis similia, brevius petiolata, longius densiusque spinuloso-serrata, 

 spinis saepe spinulis accessoriis auctis. Gapitula satis parva semiglobosa, ad 8 mm 

 diametro; bracteae involucrales angustissime lineari-subulatae, rigidae, inferne scarioso- 

 dilatatae ibique paucisetosae, basi dorso spinis deflexis subnumerosis auctae, capitulis 

 usque duplo longiores; florales anguste subulatae, flores longo superantes et cum br. 

 invol. habitum capitulorum spinosum formantes. Sepala lanceolata, cuspidato-acuminata, 

 stylis longiora; petala perparva, obovata, triente excisa, lobulo inflexo subaequilongo, 

 2 — 3-plo angustiore, apice fimbriato. Fructus ubique squamis depressis lanceolatis, 

 acuminatis, subaequalibus obsitus. 



Pazifisches Nordamerika: An grasigen, im Winter überschwemmten Stellen in 

 West-Oregon (Hall, Fl, oreg. n. 200; Howell) und im Staate Washington 

 (Suksdorf, Fl. Wash. n. 344); blüht im Juli und August. 



56. E. elongatum Coult. et Rose in Contr. U. S. Nat. Herb. VII. 4. (4 900) 53. — 

 Planta 30 — 40 cm alta, superne ramosa, apice plurifurcata, ramis dr cymose ramulosis. 

 FoUa basalia elongato-oblanceolata, margine spinuloso-serrata, apice abrupte acuminata, 

 inferne sensim in petiolum alatum spinulosum angustata et cum eo usque 30 cm longa; 

 caulina similia, sed multo angustiora. Gapitula breviter stricteque pedunculata, sub- 

 globosa, ad 4 5 mm longa; bracteae involucrales lineai*es, vix rigidulae, deniuni reflexae 

 et usque 25 mm longae, basi ± scarioso-marginatae, ceterum margine setoso-spinu- 

 losae; florales rigidae, angustae, integerrimae, margine infero scariosae ibique plerumque 

 inermes, floribus paullo longiores. Sepala ovata, abrupte mucronato-apiculata, 2 nmi 

 longa, stylis breviora. 



Pazifisches Nordamerika: Californien, in der Bai-Region (Vasey, nach 

 Coulter und Rose). 



Nota. Spccimina mihi non visa. Stirps scc. descriptionem £". pe^ib^to Hook, vaide affinis 

 esse videtur. 



57. E. Jepsonii [E. jcpsoni) Coult. et Rose in Contr. U. S. Nat. Herb. VII. 4. 

 (4 900) 54; Jeps. Fl. West. Middle Calif. ed. 2. (4 9 4 4) 289. — E. califomicum Jops. 

 1. c. ed. 4. (4 904) 343. — E. petiolatum Aut. amer. plur. non Hook. — Gaules phires 

 graciles, 40 — 60 cm alti, mox supra bosin ramosi, apice plurifurcati, ramis cymose 

 divisis. Folia vetustiora fistulas septatas, apice breviter dilatatas sistentia, ca. usque 

 60 cm longa, sub anth. plerumque jum emortua, f. serius exorta et caulina oblanceolala, 

 haud rare remote et anguste pinnatiQda, spihuloso-incisa, ad basin versus in petiolum 



