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Miscellaneous/oldest

procambial cells/dispersed meristematic cells

TAIR requested the term 'dispersed meristematic cell'

This terms is probably best incorporated as a synonym of leaf procambial cell (new term). See SF tracker item for details of discussion.

Suggest using the following hierarchy:

meristematic cell (PO:0004010)

-[is_a] procambial cell (new)

- -[is_a] leaf procambial cell (new); synonym: dispersed meristematic cell

procambium (PO:0006074)

-[is_a] leaf procambium (new)

- -[part_of] leaf procambial cell (new)

Proposed defintions:

procambial cell: A meristematic cell that is part of a portion of procambium. part_of procabium

leaf procambrium: A portion of procambrium tissue that is part of a leaf. part_of leaf

leaf procambial cell: A procambial cell that is part of a leaf procambium. part_of leaf procabium syn: DMC, dispersed meristematic cell

ovary septum vs. carpel septum

There was a request for a new term 'ovary septum.' but after a long discussion on SF, the conclusion seems to be that ovary septum should be a synonym of carpel septum.

Current definition of carpel septum: A thin partition or membrane that divides multilocular ovary. Often found in species with syncarpous (multiple carpels fused) pistil. [source: GR:cwt, GR:pj]

Suggest placing the second sentence in a comment and removing the word often:

Revised comment: Found in species with syncarpous gynoecia (fused carpels). Synonym: ovary septum

Current definition of septum is: A thin partition or membrane that divides a cavity or a mass of tissue, e.g., in anther, ovary or fruit. [source: APWeb:Glossary], is_a portion of plant tissue.

Suggest that septum should be a cardinal organ part, rather than a portion of plant tissue.

Proposed definition of septum: A cardinal organ part that is a partition or membrane that divides a cavity or a mass of tissue, e.g., in anther, ovary or fruit.

Legume terms

submitted by Austin Mast

Several terms have already been dealt with (Taproot, Stem Hair, Prickles, Anther pore and anther slit)

fascicle The term fascicle can refer to different structures in different taxa. Suggest we use the term floral fascicle or flower fascicle in this case, to distinguish it from a "leaf fascicle," which we may want to add for describing gymnosperms.

From Tucker, 2003, Flora: (in the Papilionoideae) "Pseudoracemes (Fig. 5B) differ from racemes in that two to several flowers are initiated in each bract axil rather than just one as in a raceme. The cluster of flowers at each node is called a fascicle. The order of initiation among flowers at a node (Fig. 5B, Psoralea macrostachys DC) shows the fascicle to be a short shoot topped by a second order inflorescence apical meristem. This meristem initiates flowers in a bilaterally symmetrical order: a single abaxial flower, then two lateral flowers, another median abaxial, then two more laterals. The number of flowers per fascicle depends on the duration of the axillary inflorescence apex of the short shoot, which ceases activity after initiating the few flowers in the fascicle. No flowers are initiated adaxially (toward the first order axis) on the short shoot (Tucker, 1987b; Tucker and Stirton, 1991). The short shoot in a pseudoraceme can be distinguished from a cyme in that every flower is bract subtended in a pseudoraceme."

Suggested def: A second order inflorescence in which the second order inflorescence branch bears two or more flowers but is not elongated. Comment: A fascilce appears to be a cluster of flowers in an axil of a single bract of the main inflorescence. Common in some sections of the Fabaceae.

bristle (used in key as "Stipules spinose or bristles"; might be thought of as a quality, rather than a structure)

We added the term stipule spine. Could also add the term stipule bristles: A stipule that has a brush-like appearance.

Alternative is to suggest bristled to PATO

phyllode Suggested def: A leaf in which there is no normal lamina development, but instead the petiole or petiole plus rachis is laminar.

banner, wing and keel

Banner (as in a legume flower) - suggest using name 'banner petal'

Suggested def: A petal that is the top-most petal of a corolla in some flowers of the Fabaceae. Comment: The banner is usually larger than the adjacent wing petals.

Wing (as in a legume flower) - suggest using name 'wing petal'

Suggested def: One of two petals that is adjacent to the banner petal in some flowers of the Fabaceae. Comment: The wing petals are usually much smaller than the banner petal and the corolla keel.

Keel (as in a legume flower): The keel consists of two fused petals, and is analogous to the fused collective tepal structure we made for Musa. Maybe name 'corolla keel'

Suggest three new terms:

fused petal: A petal that is fused to another petal. Comment: May be fused to two petals (one on either side). This is a phenotype that is a cross-product of PO:0009032 (petal) and PATO:0000642 (fused with).

fused corolla: A corolla in which the petals are fused. Comment: This is a phenotype that is a cross-product of PO:0025023 (collective phyllome structure) and PATO:0000642 (fused with). A corolla may consist of a combination of fused and free petals, in which case fused corolla only refers to those petals that are fused.

corolla keel: A fused corolla that consists of the two lowest petals in some flowers of the Fabaceae. Comment: The two petals of the keel may be fused at the apex but free at the base. The remaining three petals (banner and two wings) are free. The keel is boat shaped.

locule The term locule can be used to refer to the cavity in an carpel or in an anther. In the PGDSO, we have the term PO:0001026 locules established, which is an anther development stage. For clarity, we may want to add two terms: locule, anther locule and carpel locule.

anther locule: A plant anatomical space that is a cavity in an anther formed by a single pollen sac.

carpel locule: A plant anatomical space that is a cavity in a carpel that contains at least one ovule. Comment: A syncarpous gynoecium may have multiple locules, and the locules of multiple carpels may be fused.

May want to add general parent terms locule: A plant anatomical space that is a cavity within a sporophyll. Synonym: loculus

TraitNet requests

corm

proposed def: A short, enlarged storage stem in which the internodes do not elongate. Comment: usually underground.

child of stem (PO:0009047).

podarium

Their comment: is synonym to Tubercle

podarium (from Beentje 2010): (in cacti or other succulents) a modified leaf base functioning as the photosynthesising organ.

tubercle (from Beentje 2010): (in ball- or barrel- shaped cacti), cone-shaped protuberances that are elnarge modified leaf bases fused with adjacent stem tissue (tubercle has two other definitions as well).

proposed def:

pneumatophore

definition from Beentje (2010): erect (breathing) root protruding above the soil, encountered especially in mangroves

proposed def: A root that is erect and protrudes above the soil, found in trees that live in flooded habitats such as mangroves. Comment: Pneumatophores may provide oxygen to below ground roots growing in flooded soils.

stele

We dealt with this under terms without is_a parents

diaspore

definition from Beentje (2010): reproductive portion of a plant, such as a seed, fruit or fragment of fruit, that is dispersed and may give rise to a new plant.

We could add this term as a kind of upper level bin term (similar to trichome)

cone

Should probably be a synonym of strobilus (PO:0025083). Narrow or exact?

sorus

from Crum (2001): a cluster of fern sporangia from Beentje (2010): (of pteridophytes) structure bearing or containing groups of sporangia.

Proposed definition: A cardinal organ part composed of a cluster of two or more adjacent sporagia on the surface of a leaf. Comment: May be enclosed by an indusium.

Part_of vascular leaf, has_part sporangium

tendril

Defintion from Beentje (2010): a slender, coiling structure derived from a branch, leaf or inflorescence and used for climbing.

tendrils can derived from multiple types of structures. Suggest we make separate terms:

branch tendril (child of branch): A branch that is slender and coiling. Comment: Aids plant in climbing.

leaf tendril (child of leaf): A leaf that is slender and coiling and lacks a lamina. Comment: Aids plant in climbing.

leaflet tendril (child of leaflet): A leaflet that is slender and coiling. Comment: Aids plant in climbing.

leaf apex tendril (child of leaf apex): A leaf apex that is slender and coiling. Comment: Aids plant in climbing.

Can add other types of tendrils if they come up or users need them.

Adding/modifying the root terms

submitted by Rich Zobel (Nov 2009)