Terms from Gramene ontology that did not map to POC

Androgynophore :The stipe or column on which stamens and carpels are borne.
Aperture: A depressed region in the pollen wall in which thick intine is covered by thin exine; the pollen grain emerges through the aperture.
Atactostele: A stele consisting of vascular bundles scattered throughout the ground tissue as in the Monocots
Bran: The pericarp, testa and usually the aleurone layer of cereal seeds which are removed in milling.
Casparian strip: A band like wall formation within primary walls that contains suberin and lignin; typical of endodermal cells, in which it occurs in radial and transverse anticlinal walls.
Cotyledon primordium: The earliest differentiated state of a cotyledon.
Crown: Located between the coleoptile and the mesocotyl, the crown contains the growing point where the rest of the plant will begin to form and the nodes where the nodal or permanent roots will form.
Cuticle: It is a continuous layer of cutin secreted by the epidermis, it prevents plant desiccation by being impervious to water and gas exchange and covers the aerial parts of the plant body, broken only by stomata and lenticels.
Embryonic ground tissue: Ground tissue (parenchymatous) layers found in the embryo.
Fibrous root: Roots characterized by many similar branching roots of common length and thickness. Generally not highly adapted for food storage. –plant anatomy glossary.
Gametophytic cell: A haploid (1n) cell developing into a male or female gametophyte in heterosporous plants. Synonym for gametophyte.
First embryonic leaf: The first leaf of the plant, often found developing with the embryo 
First leaf: The first mature leaf present just below the flag leaf in a cereal crop plant.
Floral primordium: Primordial tissue giving rise to the floral whorls.
Laticiferous vessel: An articulated laticifer in which the cell walls between cells are partially or wholly lacking. Plant anatomy glossary.
Leaflet midvein: The central conducting and supporting structure of the blade of a leaflet of a compound leaf.
Leaflet veinlet: Branched secondary veinlets conducting and supporting structure of the blade of a leaflet.
Medine: Layer between the exine and intine.
Nucellar cells: Crushed nucellar cells present in multiple layers.
Organ primordium: An organ or a part in its most rudimentary form or stage of development.
Ovary inner epidermis: Inner epidermal layer of the ovary wall.
Ovary locule : An opening or cavity within ovary. Plant anatomy glossary.
Ovary outer epidermis: Outer epidermal layer of the ovary wall.
Ovary parenchyma: Parenchyma layer of the ovary wall.
Ovary vascular system: vascular system of the ovary.
Perforation plate: That region of a cell wall which is perforated, and found in a vessel member. Plant anatomy glossary.
Phloem fiber: Fiber found in phloem parenchyma.
Phloem Parenchyma: Parenchyma found in phloem.
Plant organ: Represents the organs and its sub-types in a plant.
Primary endosperm nucleus: Nucleus resulting from the fusion of the male gamete and two polar nuclei in the central cell of the embryo sac.
Prop root: Aerial adventitious roots which usually provide support
Proximal root meristem: Lies next to the quiescent centre of the root tip and participates in the formation of root epidermis, stele and cortex. -Annals of Botany, 79,375-389,1997.
Replum: Persistent septum after dehiscence of fruits, as in the Brassicaceae
Rhexigenous aerenchyma: Applied to an aerenchyma originating by rupture of cells
Root primordium: The primordial tissue of the root.
Sclerenchyma perivascular: Sclerenchyma located along the outer periphery of the vascular cylinder and not originating in the phloem.
Sclerenchyma sclereid cell: Type of sclerenchyma cell that differs from the fiber cell by not being greatly elongated
Sieve plate: Wall of a sieve element with sieve areas.
Septum: A partition. Plant anatomy glossary.
Staminal disc: A fleshy, elevated cushion formed from coalesced staminodia or nectaries.
Stamonodium: Sterile stamen, may be modified as a nectary or petaloid structure.
Stem vascular system: The vascular system of the stem.
Stomatal pore: The pore in the epidermis, surrounded by two guard cells. Meant for gaseous exchange.
Third leaf: The third meture leaf present below the flag leaf in a cereal crop plant.
Vascular bundle: A strand of conducting tissue comprising of phloem, xylem, and cambium.
Xylem cell radial: The secondary xylem cell aligned, forming radial files of cells that are produced from a single cambium initial cell. http://koning.ecsu.ctstateu.edu/plant_biology/secondary.html
Xylem fiber libriform: A very long xylem fiber with thick walls and simple pits. Plant anatomy glossary.
Xylem parenchyma axial: Parenchyma cells running axially, derived from elongated fusiform cambial cells.
Xylem parenchyma radial: Parenchyma cells extending radially between the secondary xylem and phloem.
Xylem parenchyma radial procumbent: The ray cell with longest diameter arranged radially.
Xylem parenchyma radial upright:The axially elongated cell in radial xylem parenchyma. Appear generally at the upper and lower margins of the ray.
Xylem parenchyma radial homocellular: Xylem ray composed of one type of cell.
Xylem parenchyma radial heterocellular: Xylem ray containing procumbent and upright cells.
Xylem tracheary element wall: 
http://www.mhhe.com/biosci/pae/botany/crang/gloss_top.html