PLATE IV. 



Each magnified about j diameters. 



No. 1 Ipomoea hederacea J acq Field Morning-glory, 2 seeds. 



2 Amsinckia intermedia F&M Amsinckia, 2 seeds. 



3 Amsinckia tessellata Gray Amsinckia, 2 seeds. 



4 Verbena urticifolia L White Vervain, 4 seeds. 



5 Verbena kastata L Blue Vervain, 4 seeds. 



6 Nepeta Cataria L Catnip, 4 seeds. 



7 Prunella vulgaris L Self-heal, 4 seeds. 



8 Lamium amplexicaule L Henbit, 4 seeds. 



9 Salvia lyrata L Sage, 2 seeds. 



10 Hedeoma pulegioides (L) Pers Pennyroyal, 4 seeds. 



11 Per ilia frutescent ( L) Britton Perilla, 2 seeds. 



12 Solatium Carolinense L Horse Nettle, 4 seeds. 



13 Solatium Dulcamara L Climbing - Bittersweet, 2 seeds. 



14 Verbascum Blattaria L> Moth-mullen, 4 seeds. 



15 Plantago major L Broad Plantain, 4 seeds . 



16 Plantago Rugelii Dec Rugel's Broad Plantain, 4 seeds. 



17 Plantago lanceolata L Narrow or Buckhorn Plantain, 4 seeds. 



18 Plantago aristata Michx Bracted Plantain, 4 seeds. 



19 Sherardia arvensis L Blue Field-madder, 2 seeds. 



20 dehor ium Intybus L Chicory, 2 seeds. 



21 Taraxacum Taraxacum (L) Karst Dandelion, 2 seeds. 



22 Picris echioides L Worm Salad, 2 seeds. 



23 Lactuca virosa L Prickly Lettuce, 4 seeds. 



24 Lactuca saligna L Willow Lettuce, 4 seeds. 



25 Hieracium aurantiacum L Golden Hawkweed, 4 seeds. 



26 Sonchus asper (L) All Sow-thistle, 2 seeds. 



27 Sonchus oleraceus L Sow-thistle, 2 seeds. 



28 Achillea millefolium L Yarrow, 2 seeds. 



29 Anthemis Cotula L Mayweed , 4 seeds. 



30 Chrysanthemum Leucanthemum L Oxeye Daisy, 2 seeds. 



31 Erechtites hieracifolia { L) Raf Fireweed, 2 seeds. 



32 Matricaria inodora L Scentless Camomile, 2 seeds. 



From original photographs bv P. A. Hinman and jf. M. Van Hook. 



