FIELDS H-1 and H-2 

 Columns 29, 30, 31, 

 32, 33, and 34 



H6 Root prlmordium 



I Stem; shoot (unspecified as to whether it is a main stem, branch, aerial, subterranean, 



or otherwise specially modified). (Use this symbol also for plants having only one of 

 the two stem types, aerial or subterranean. See Symbols 17 and 18. ) 



II Node 

 K Leaf 



Jl Axillary bud (or J2 or J3) 



12 Internode, otherwise unspecified 



121 (To be used in Field H-1 only. ) Internode below a site of local application of the test 



compound. (Code the plant part to which application is made [e. g. , internode, node, 

 leaf, or branch] in Field H-2. ) 



122 (To be used in Field H-1 only. ) Internode above a site of local application of the test 



compound; internode developed after the test compound is applied locally to a plant 



part or after general application (e. g. , spraying). (Code the plant part to which application 



is made [e. g. , internode, node, leaf, or branch] in Field H-2. ) 



13 Main stem (as opposed to secondary stems branching from the main stem) 



14 Secondary stem; branch 



15 Terminal portion of stem (including stem tip or stem bud and young nodes and internodes) 



16 Inflorescence stem (only stem structures of the flower), in toto ; pedicel and receptacle, 



in to to 



161 Pedicel (exclusive of receptacle) 



162 Receptacle 



17 Underground stem. (To be used only for plants which normally have both specific aerial 



and specific subterranean stems- -to distinguish which of these responds or is treated. 

 See also Symbol I. ) 



18 Aerial stem. (To be used only for plants which normally have both specific subterranean 



and specific aerial stems- -to distinguish which of these responds or is treated. See 

 also Symbol I. ) 



19 Lenticel of stem 



J Bud (an organization of meristematic tissue which, by formation of typical plant tissues 



and organs, is the focus of formation of new stems or modified stems with associated 

 appendages)- -dormant or actively developing 

 Jl Axillary, lateral stem bud with only leaf primordia (axillary leaf bud) 



J2 Axillary, lateral stem bud with only flower primordia (axillary flower bud) 



J3 Axillary, lateral stem bud with both leaf and flower primordia (axillary mixed bud) 



14 Terminal stem bud with only leaf primordia (terminal leaf bud) 



15 Terminal stem bud with only flower primordia (terminal flower bud) 



16 Terminal stem bud with both leaf and flower primordia (terminal mixed bud) 

 K Bud scale 



J7 Adventitious bud (a bud other than a terminal bud and other than a bud arising from a node) 



171 Adventitious stem bud arising from the root 



J72 Adventitious stem bud arising from the leaf petiole or leaf blade 



173 Adventitious stem bud arising from a stem site other than a node (e. g. , a bud arising from 



the tissues of old stems in which nodal and internodal distinctions have been submerged by 



secondary thickenings). (For an adventitious "flower bud", use Symbol J74. ) 

 J74 Adventitious stem bud, having only one or more flower primordia, arising from a stem site 



other than a node 

 K Leaf; mature , typical leaf. (Use Symbols K4 and K5 for typical seedling leaves. ) 



Kl Stoma and guard cell 



K2 Petiole; leaf stalk (exclusive of stipules); sheath (of grass leaf) 



K3 Leaf blade 



K31 Leaf tip; leaflet tip 



K32 Leaf margin; leaflet margin 



N34 Cotyledon 



K4 Primary leaf (= first true leaf of a seedling; first leaf above cotyledon; leaf at the first 



node above the cotyledon) 

 K Typical leaf, after the primary leaf, unspecified as to whether it is second, third, etc. 



K5 Second true leaf of a seedling (= leaf at the second node above the cotyledon) 



K6 Third true leaf of a seedling (= leaf at the third node above the cotyledon) 



K7 Fourth true leaf of a seedling (= leaf at the fourth node above the cotyledon) 



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