4 AMERICAN MIDLAND NATURALIST 



lanceolata, acuminata, in petiolum longum lentissime reducta, 

 5-7 cm. longa, petiolo longitudine aequali. Folia radicalia et 

 caulina inferiora dentibus 4-5 amplis attenuato-acutis margin- 

 aliter utrimque provisa. Capitula 1.5-2 cm. diametro (radiis 

 albis inclusi.s). 



Stems simple, usually 3-headed, 30-35 cm. high, pubescent, 

 sparingly covered with leaves, these being narrowly linear, entire 

 and long-acuminate on the upper half, and on the lower half 

 lanceolate, acuminate, very gradually tapering into a long petiole, 

 5-7 cm. long, with petiole of the same length. Radical and lower 

 cauline leaves with 4-5 large, attenuate-pointed teeth on each 

 side of the margin. Heads small for the size of the plant, 1.5-2 

 cm. in diameter, including the rays. 



Collected by the writer in wet soil on June 19, 19 12, at Butte, 

 Benson County. 



II. Erigeron oligodontus sp. nov. 



Caules 1-6, simplices, i usque 4-capitati, graciles, 25-35 

 cm. alti, pilis diffusis vel retrorsis vestiti, restricte foliosi. Folia 

 caulina superiora sessilia, anguste linearia vel bracteis similia, 

 integra, inferiora et radicalia lanceolata usque anguste lanceolata, 

 5-15 cm. longa (petiolo incluso), ad basin .sensim reducta, apice 

 tenuissime aculeata, alia marginibus integris, alia dentibus paucis, 

 insigniter salientibus, parvis, interdum sub lente solum manifestis 

 ornata. Capitula circa 2-2.5 cm. diametro (radiis albis vel rubi- 

 cundis inclusis). 



Stems 1-6, simple, i to 4-headed, slender, 25-35 cm. high, 

 covered with spreading or retrorse hairs, sparingly leafy. Upper 

 stem leaves sessile, narrowly linear or bract-like, entire. Lower 

 cauline and radical leaves lanceolate to narrowly lanceolate, 5-15 

 cm. long (including the petiole), gradually tapering toward the 

 lower end, very slenderly pointed at the apex, some with entire 

 margins, others with few, remarkably salient, small teeth, sometimes 

 only visible under a lens. Heads about 2-2.5 cm. in diameter, 

 including the white or pink rays. 



Frequent at Butte, Benson County, in damp meadows. It 

 was collected there by the writer on June 19, 191 2. 



12. Erigeron oligodontus var. acuminatus var. nov. 

 Vide Clavem analyticam. 

 The scanty jjubescence of the stem with ui)turned, appressed 



