phytography

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The science of plant description; descriptive botany.

from The Century Dictionary.

• noun The description of plants; that branch of botany which concerns itself with the rules to be observed in describing, naming, and classifying plants.
• noun Same as phytoglyphy.

from the GNU version of the Collaborative International Dictionary of English.

• noun The science of describing plants in a systematic manner; also, a description of plants.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany The branch of botany concerned with the description of plants.