778 Systematik und Pflanzengeographie. 



Luznla, Eriophorum, Carex, Arctophila, Avena, Cala- 

 m agr OS ti s u. s. w. 



Die kritischen Car ex-Arten wurden von Dr. H. Christ, die 

 C al am a g ro st i 8 -Arten von Dr. S. Almqvist und die Gattung Salix 

 von Dr. A. Lundström bestimmt. 



Arnell (Jönköping). 



Greene , Edw. L. Some American Polemoniaceae. L 

 (Pittonia. Vol. I. Part. III. p. 120—139.) 



Revision der Gattungen Polemonium, Collomia und Navarretia. 

 Die Gruppirung der Arten ist folgende, wobei die neuen Arten 

 mit * bezeichnet sind : 



Polemonium (Auetor oinuium). j|i 



* Root annual: flowers solitary opposite tlieleaves. Species 

 non typical: P. micranthum Benth. 



** Root perennial; corolla campanulate; Stamms free or 

 nearly so and strongly declined. Typical species. 

 " Stem-leaves few; inflorescence loose and open: P. reptans 

 L., P. carneum Gray. 

 "•^ Sterns leafy; inflorescence more congested and terminal: 

 P. flav^lm Greene, P. filicinum Greene *, P. pectiuatum Greeue, P. folio- 

 sissimum Gray. 

 *"^ Stems very leafy at or near the base, naked, or nearly 

 so, above; flowers very few and cymose or many in race- 

 mose or thyrsoid Clusters: P. caeruleum L., P. humile Willd.^ 

 P. viscosum Nutt, 

 *** Eoot perennial; leaflets imbricated, simple or 2-parted; 

 corolla narrowly funnelform, the tub e exce edi n g the limb.. 

 **Stamens adrate to the middle of the tube, or higher, 

 slightly or not at all declined; flowers blue, variing to- 

 white: P. confertum Gray. 

 •"^ Staniens adnate almost wholly, hence not susceptible of 

 being declined; corolla yellow, the limb morespreading 

 than in the last, tnbe still narr o we r: P. Brandegei (Gilia Gray) 

 Greene. 

 Collomia Nutt. et Auct. omnium. 



* Perennial species, not typical, the stamens exerted and 

 declined: C. debilis (Gilia Watson) Greene. 



** Ann u als with strict and simple stem and flowers in capi- 

 tate-crowded terminal leafy Clusters; typical species, the 

 leaves all entire: C. grandiflora Dougl., C. linearis Nutt. 

 *** A n n u a 1 s b r a n c h e d f r o m the base. 



" B r a n c li e h d e p r e s s e d ; flowers in n e a r 1 y o r q u i 1 e b r a c 1 1 e s s 

 small Clusters, in the axils, und at the ends of the 

 branclies: C. heterophylla Hook., C. diversifolia Greene*. 

 '"' Brauches ascending; flowers bractless and few or soli- 

 tary in all the axils: C. tinctoria Kellogg, C. tenella Gray. 

 Navarretia Kuiz et Pavoii. 



* Pericarp hyaline and iudehiscent, the walls closely ad- 

 herent to and transparently exhibiting the agglutinated 

 mass of dark-colored mucilaginous seeds: N. iuvoiucrata K. et 

 P., N. prostrata (Gilia Gray) Greene *, N. leucocephala Benth., N. minima. 

 Nutt., N. intertexta Hook. 



** Capsule of firm texture, opagne, more or less perfectly 

 dehiscent; seeds not agglutinate in a mass. 



" Leaves glabrous, setaceously multifid, but soft and in- 

 ocuous; only the floral bracts pungent; herbage scent- 

 less: N. cotulaefolia Hook. Arm., N. nigellaeformis Greene*. 



