Detailed overview:
Flowering Plant Family Identification
Title: Flowering Plant Family Identification
Title alternative: World Wide Flowering Plant Family Identification
Creator: Phillips, Ray
Abstract: This WWW form is an implementation of the Hansen and Rahn punched card system for flowering plant family identification. It is comprehensive to enable world wide flowering plant identification. In the original form, each card of the deck is labeled as one character (actually, character state, such as “Leaves Opposite”), there being 172 cards in the deck. On each card there are 411 numbered circles, each corresponding to a family of flowering plants. If the character listed on the card was known to be present in at least one member of a family, that family number-circle was punched open. The process of identification requires sorting through the deck of cards, pulling out those that present characters observed in the specimen that is being identified, putting this set of cards together in a stack, holding the stack of cards up to a light source, and seeing which family numbers were punched through on all the cards in the stack. If a suitably large number of character cards are selected, only a single family number will be punched on all the cards, and the identification will have been made. More typically, a number of families will be identified as possible. The punch card system is a process of elimination. Selecting a card excludes certain families because their numbers are not punched on that card. Because a family number is punched if ANY member of the family has that feature, only those families that the specimen could not possibly be are determined by each character card selection. If a mistake is made in selecting a card because of misinterpretation of the character or in examining the specimen, misidentification might occur. [Information of the supplier]
Subject: Classification in botany (580.12)
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Audience: Beginner; Intermediate
Language: English
Format: website
Resource type: Identification keys
Access: free
Metadata update date: 2014-01-02
Metadata provider: UBFfm
URL of this vifabio-resource:
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