. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. 6 BARTONIA like arrangement of the leaflets. The name most used by laymen is " Bluebells, but as this is also applied to species of Campanula, Mertensia, etc., it is not sufficiently distinctive. Possible modifications would be " Fernleaf Bluebell" or " Bluebell Valerian," but, like the occasionally heard " False Forgctmenot" these are too cumbersome. The layman who already uses without hesitancy such names as Chrysanthemum, Delph
. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. 6 BARTONIA like arrangement of the leaflets. The name most used by laymen is " Bluebells, but as this is also applied to species of Campanula, Mertensia, etc., it is not sufficiently distinctive. Possible modifications would be " Fernleaf Bluebell" or " Bluebell Valerian," but, like the occasionally heard " False Forgctmenot" these are too cumbersome. The layman who already uses without hesitancy such names as Chrysanthemum, Delphinium, and Geranium should have no difficulty in adopting the genus name Polemonium itself for a " common ; POLEMONIUM: KEY TO EASTERN SPECIES Stem relatively strong, 75 to 125 cm. tall; principal leaves divided into 11 to 21 leaflets; in- flore^encea'^narrow'panicle; corolla-color rather deep violet; stamens declined subp^^^^^^^^^ exserted; anthers orange-yellow '."."-"" V*/ . r i a , • ' Stem relatively weak. 25 to 75 cm. tall; principal leaves divided mto 7 to 15 leaflets; m- fllTrescence a"^ wide panicle; corolla-color rather light blue-violet; stamens "-cgularly de- cumbent, included; anthers cream-color £. r. rt^j Haktuma, No. 17 Plate 2. Fig. 1. Distribution of Polemonium vanbruntiae. 1. Polemonium vanbruntiae Britton. Tall Polemonium. Plate 2, Fig. 1. His^ori/.—This Polemonium was apparently first observed in Schoharie County, New York, by a Dr. E. C. Howe about 1860, and was included in the list of addenda to the fourth edition of Gray's Manual ^ under the name P. coerulcum. In subsequent years its known range gradually increased, although it was long referred to that European species. Its distinctness was first urged by Britton ^ who in 1892 named it in honor of Mrs. Van Brunt. The original form of the name was Van-Bruntiae, but the writer prefers condensation and decapitalization of all species names. Geography.—Dur
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