Conocurvone, anti-HIV active agent from Conospermum

Vermilacinia johncassadyi

Conospermum unilaterale

Specializing in Botanical Surveys
Plant Inventories/Floristic Studies
Biomass Estimates of Species
Biodiversity Collections for Pharmacological Screening

PO Box 81145
Bakersfield, California
Phone: 661-587-0214
Mobile: 661-342-9563

Fax 661-589-5369

Richard Spjut, Principal Investigator


No other principals
Last updated
 08 Nov 2014



Plants for Pharmacological Screening


Random Samples collected with limitation only to avoid duplication of species, sometimes referred to as “biodiversity sampling” or “biodiversity prospecting.”   
Systematic  Samples obtained according to phytogeographic and taxonomic criteria,  and by emphasis on plant parts most likely to show activity.  Cost according to limitations.
Folklore Collections guided by ethnobotanical data, either by working directly with local practitioners, or by reports in literature.   




Taxus brevifolia (Pacific yew) stem-bark

 Extracts and Screening

Taxol in various stages of preparation


1.  Plant Procurement Data on Antitumor Active Plants from the United States (1960–1982)  

2. Baja California Plants Screened for Antitumor Activity

3. Plants Used As Anthelmintics, Fish Poisons, Arrow Poisons Screened For Antitumor Activity

4. Bryophytes Collected for Antitumor Screening


Photographs and Reports of Plants from Around the World

  Africa                  Australia                      North America


Taxonomic Reports



1.  Key to 44 Species of Carex
on the Beltsville Agricultural
     Research Center, Maryland. 


2.   Mobergia
      Niebla and Vermilacinia Communities

     Review: Lichen Flora of the
         Greater Sonoran Desert Region

Fruit and Seed Terminology

3.  A Systematic Treatment  of Fruit Types.

4.  Reviews: (a) Fruits and Seeds of Brazil Dicots
        (b) Seeds: The Time Capsules of Life
        (c) Fruit: Edible, Inedible, Incredible
        (d) Fruits of the Australian Tropical Rainforest
        (e) Tropical and Subtropical Trees:
              An Encyclopedia

5. Trees and Shrubs of Kern County, California

6. Phytogeography of Colubrina and Lasiodiscus


  7 Nomenclatural and Taxonomic Review
      of Three Species and Two Varieties of
      Taxus (Taxaceae) in Asia 
Table 1.

 8.  Keys and Descriptions for Species
       of Taxus

             Introduction to Taxonomy of Taxus

             North America.  Includes stomata data 
           for herbarium specimens plotted on 
           map of North America.

             Species Groups and Subgroups
           (Classification,  WBA Online Herbarium
             of Taxus Images).

             A phytogeographical analysis of Taxus
             (Taxaceae) based on leaf anatomical
             characters.  J. Bot. Res. Inst. Texas 1:

            Taxonomy and nomenclature of Taxus
(Taxaceae). J. Bot. Res. Inst. Texas 1:

 9.  Folklore: Relationships between plant
           folklore and antitumor activity: An
           historical review.  Sida 21(4):


Links to Other Sites with Images and Taxonomic Data

Consortium of North American Lichen Herbaria
Photo Gallery of lichens in Europe
Angiosperm Phylogeny Website
Origin of Angiosperms
The Seed Biology Place
Wayne's Word ["Textbook of Natural History"]
Nature Alley [California Biodiversity]
Plant Species around Las Vegas [Broad geographical coverage; e.g., mentions 8 species of Ephedra, 5 species of Juniperus]
Consortium of California Herbaria

Consortium of Pacific Northwest Herbaria
Southwest Environmental Information Network
Utah Valley University Virtual Herbarium
Consortium of Northeastern Herbaria
Vascular Plant Catalog of the Intermountain Region of Western U.S.
   The New York Botanical Garden: C. V. Starr Virtual Herbarium
University of Florida Herbarium
Atlas of Florida Vascular Plants
Fairchild Tropical Botanic Garden Virtual Herbarium
Caribbean Plant Photos
UPR-Mayagüez Department of Biology Herbarium (MAPR)
Plants of Hawaii
Hawaiian Alien Plant Studies
Hawaiian Native Plant Genera
The Neotropical Botany Pages
Flora de la Amazonía Peruana
Trees and Shrubs of the Andes of Ecuador
Kew: Plants and Fungi
Royal Botanic Garden Edinburgh
Dryades Project, University of Trieste, Vascular Plants of Italy