Porophyllum pygmaeum (Asteraceae), a Distinctive New Species from Southern Nevada, David J. Keil, James D. Morefield
David J. Keil

Documented Chromosome Numbers 1990: 1. Miscellaneous North American Vascular Plants, Bruce D. Parfitt, Donald J. Pinkava, Debbie Rickel, Dan Fillipi, Beth Eggers, David J. Keil
David J. Keil

Lectotypification of Pectis L. (Asteraceae), David J. Keil
David J. Keil

Plant Photosensitizers: A Survey of Their Occurrence in Arid and Semiarid Plants From North America, Kelsey R. Downum, Sergio Villegas, Eloy Rodriguez, David J. Keil
David J. Keil

Synopsis of the Florida Species of Pectis (Asteraceae), David J. Keil
David J. Keil

Revision of Pectis Section Pectidium (Compositae: Tageteae), David J. Keil
David J. Keil

New Species of Pectis (Asteraceae) from the West Indies, Mexico, and South America, David J. Keil
David J. Keil

Chromosome Studies in Asteraceae from the United States, Mexico, the West Indies, and South America, David J. Keil, Melissa A. Luckow, Donald J. Pinkava
David J. Keil

New Combinations in Gnaphalium (Asteraceae: Inuleae), G. Ledyard Stebbins, David J. Keil
David J. Keil

New Taxa in Pectis (Compositae: Pectidinae) from Mexico and the Southwestern United States, David J. Keil
David J. Keil

Chromosome Counts of Compositae from Mexico and the United States, David J. Keil
David J. Keil

Pectis Humifusa New to the Flora of the United States, David J. Keil
David J. Keil

A Revision of Pectis Section Pectothrix (Compositae: Tageteae), David J. Keil
David J. Keil

Clematis coahuilensis (Ranunculaceae), a New Species from North-Central Mexico, David J. Keil
David J. Keil

Chromosome Counts of Compositae From the United States, Mexico, and Guatemala, David J. Keil, Tod F. Stuessy
David J. Keil

Systematics of Isocarpha (Compositae: Eupatorieae), David J. Keil, Tod F. Stuessy
David J. Keil

Chromosome Studies in North and Central American Species of Pectis L. (Compositae: Tagetaea), David J. Keil
David J. Keil

Review of Flora Fanerogamica Del Valle de Mexico, David J. Keil
David J. Keil

New Taxa and New Combinations in North American Cirsium (Asteraceae: Cardueae), David J. Keil
David J. Keil

Two New Species of Pectis (Asteraceae: Tageteae) from South America, David J. Keil
David J. Keil

Chromosome Counts of Compositae from the United States and Mexico, Donald J. Pinkava, David J. Keil
David J. Keil

Review of A Manual of California Vegetation by J. Sawyer & T. Keeler-Wolf, David J. Keil
David J. Keil

Diploid and Polyploid Cytotype Distribution in Melampodium cinereum and M. leucanthum (Asteraceae, Heliantheae), Tod F. Stuessy, Hanna Weiss-Schneeweiss, David J. Keil
David J. Keil

Correct Author Citation for Cirsium eatonii var. Eriocephalum (Asteraceae: Cardueae), David J. Keil
David J. Keil

Correct Author Citation for Cirsium eatonii var. Eriocephalum (Asteraceae: Cardueae), David J. Keil
Biological Sciences

Diploid and Polyploid Cytotype Distribution in Melampodium cinereum and M. leucanthum (Asteraceae, Heliantheae), Tod F. Stuessy, Hanna Weiss-Schneeweiss, David J. Keil
Biological Sciences

New Taxa and New Combinations in North American Cirsium (Asteraceae: Cardueae), David J. Keil
Biological Sciences

Two New Species of Pectis (Asteraceae: Tageteae) from South America, David J. Keil
Biological Sciences

Review of A Manual of California Vegetation by J. Sawyer & T. Keeler-Wolf, David J. Keil
Biological Sciences

New Combinations in Gnaphalium (Asteraceae: Inuleae), G. Ledyard Stebbins, David J. Keil
Biological Sciences

Documented Chromosome Numbers 1990: 1. Miscellaneous North American Vascular Plants, Bruce D. Parfitt, Donald J. Pinkava, Debbie Rickel, Dan Fillipi, Beth Eggers, David J. Keil
Biological Sciences

Porophyllum pygmaeum (Asteraceae), a Distinctive New Species from Southern Nevada, David J. Keil, James D. Morefield
Biological Sciences

Plant Photosensitizers: A Survey of Their Occurrence in Arid and Semiarid Plants From North America, Kelsey R. Downum, Sergio Villegas, Eloy Rodriguez, David J. Keil
Biological Sciences

Chromosome Studies in Asteraceae from the United States, Mexico, the West Indies, and South America, David J. Keil, Melissa A. Luckow, Donald J. Pinkava
Biological Sciences

Review of Flora Fanerogamica Del Valle de Mexico, David J. Keil
Biological Sciences

Synopsis of the Florida Species of Pectis (Asteraceae), David J. Keil
Biological Sciences

Lectotypification of Pectis L. (Asteraceae), David J. Keil
Biological Sciences

New Species of Pectis (Asteraceae) from the West Indies, Mexico, and South America, David J. Keil
Biological Sciences

Systematics of Isocarpha (Compositae: Eupatorieae), David J. Keil, Tod F. Stuessy
Biological Sciences

A Revision of Pectis Section Pectothrix (Compositae: Tageteae), David J. Keil
Biological Sciences

Chromosome Counts of Compositae from Mexico and the United States, David J. Keil
Biological Sciences

Chromosome Counts of Compositae from the United States and Mexico, Donald J. Pinkava, David J. Keil
Biological Sciences

Chromosome Studies in North and Central American Species of Pectis L. (Compositae: Tagetaea), David J. Keil
Biological Sciences

Clematis coahuilensis (Ranunculaceae), a New Species from North-Central Mexico, David J. Keil
Biological Sciences

Revision of Pectis Section Pectidium (Compositae: Tageteae), David J. Keil
Biological Sciences

Pectis Humifusa New to the Flora of the United States, David J. Keil
Biological Sciences

Chromosome Counts of Compositae From the United States, Mexico, and Guatemala, David J. Keil, Tod F. Stuessy
Biological Sciences

New Taxa in Pectis (Compositae: Pectidinae) from Mexico and the Southwestern United States, David J. Keil
Biological Sciences