The Vegetation and Floristics of Bull Run Mountain, Virginia [Paperback] H. A. Allard; E. C. Leonard

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Permanent Numbers to Supplement the Binomial System of Nomenclature [Paperback] Sydney W. Gould

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IOPB Chromosome Number Reports. I [Paperback] Askell Love; Otto T. Solbrig

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L.V. Crowder, J. A. Hawk, T. M. Gradziel and S. E. Fast

Brassica campestris L., a New Plant for Teaching Genetics (Chapter 10 of Tested Studies for Laboratory Teaching) by L.V. Crowder, J. A. Hawk, T. M. Gradziel and S. E. Fast

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Contributions from the United States National Herbarium, Volume 18, Part 6 : New or Noteworthy Plants from Colombia and Central America - 6 [Paperback] Henry Pittier

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Ann K. Sakai, Warren L. Wagner, Diane M. Ferguson and Derral R. Herbst

Origins of Dioecy in the Hawaiian Flora by Ann K. Sakai, Warren L. Wagner, Diane M. Ferguson and Derral R. Herbst

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Increase of the Adaptive Range of the Genus Delphinium [Paperback] Carl Epling; Harlan Lewis

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Mildred E. Mathias; Lincoln Constance

New and Reconsidered Mexican Umbelliferae by Mildred E. Mathias; Lincoln Constance

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Lemna Aequinoctialis Welwitsch : Nueva Para la Flora de America y de las Islas Filipinas [Paperback] Maria Luisa Giardelli

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The Constituents of Leaf Extracts in the Genus Lathyrus and Their Bearing on Taxonomy [Paperback] R. C. Pecket

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The Uniqueness of Plants [Paperback] A. G. Norman

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Ragweeds, Ambrosia Species, In Canada and Their History in Postglacial Time [Paperback] I. J. Bassett; J. Terasmae

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The systematics and Anatomy of Gongylocarpus (Onagraceae) [Paperback] Sherwin Carlquist and Peter H. Raven

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A New Species of Phyllanthus (Euphorbiaceae) From Central America [Paperback] Grady L. Webster

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Comparative Studies of Smilax, Section Smilax, of The Southeastern United States [Paperback] Ida E. Yates; Wilbur H. Duncan

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Peter M. Mazzeo

Betula uber-What Is It and Where Is It by Peter M. Mazzeo

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Studies in Stylidiaceae: New taxa, Field Observations, Evolutionary Tendencies [Paperback] Sherwin Carlquist

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A New Species of Phacelia From Saline Valley, California [Paperback] Lincoln Constance

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Seeds of the Cruciferae of Northeastern North America [Paperback] Margaret R. Murley

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Some Interspecific Relationships in Phacelia Subgenus Cosmanthus [Paperback] Lincoln Constance

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Cistaceae Juss., Gen. Pl. 294. 1789, nom. cons. [Paperback] Robert L. Wilbur

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Lincoln Constance; Lawrence R. Heckard

Two New Species of Phacelia (Hydrophyllaceae) from California by Lincoln Constance; Lawrence R. Heckard

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A Synopsis of Jatropha, Subsection Eucurcas, with the Description of Two New Species From Mexico [Paperback] Robert L. Wilbur

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Palynology and Systematics of Cuphea ( Lythraceae) I. Morphology and Ultrastructure of the Pollen Wall [Paperback] Alan Graham and Shirley A. Graham and Donald Geer

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Monograph of the Genus Isodendrion (Violaceae) Hawaiian Plant Studies 21 [Paperback] Harold St. John

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The Trilliums of Ontario : Technical Bulletin No. 5 [Paperback] James S. Pringle

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John E. Averett, William J. Hahn and peter H. Raven

Flavonoids of Heterogaura (Onagraceae) by John E. Averett, William J. Hahn and peter H. Raven

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Enrique Forero

El Herbario Nacional Colombiano by Enrique Forero

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Ronald L. Hartman and Lincoln Constance

A New Lomatium (Apiaceae) From the Sierran Crest of California by Ronald L. Hartman and Lincoln Constance

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The systematics and Anatomy of Gongylocarpus (Onagraceae) [Paperback] Sherwin Carlquist and Peter H. Raven

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Raul Martinez-Crovetto

Composicion Floristica de Yerbales Naturales de Los Alrededores de San Pedro by Raul Martinez-Crovetto

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P. K. Mukherjee and L. Constance

Vanasushava, An Old South Indian Umbellifer Renamed by P. K. Mukherjee and L. Constance

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