160 GLOSSARY. 



panicle, a compound raceme through branching of the pedicels; 

 thyrse, a dense mostly pyramidal panicle. 



b. Centifrugal, with the older flowers at the top or at the centre of 

 the group, 

 cyme, a flat or convex flower-cluster resembling a corymb; when flat-topped 

 it is a fastigiate cyme; when loosely spreading it is a cymose panicle; when 

 rounded it is a globose cyme; when resembling a coiled raceme through 

 one-sided development, it is a scorpioid cyme; 

 fascicle, a crowded cyme, the flowers being nearly sessile; 

 glomerule, an axillary cluster; 



verticillaster, a pair of glomerules in the axils of two opposite leaves, and meet- 

 ing around the stem of the plant. 

 Inserted: attached to an organ or growing from it. 

 Internode: the portion of a stem between two nodes. 



Introrse: facing inward; applied to anthers which face towards the pistil. 

 Involucre: bracts collected into a whorl or in spiral rows, subtending a flower or an 



inflorescence; — involucel is a small or a secondary involucre. 

 Laciniate: provided with an irregular and deeply cut fringe; 

 Latent: dormant, inactive, applied to buds. 

 Latex: the milky juice of some plants. 



Leaves: a leaf consists of the blade or lamina and the petiole; absence of the pet- 

 iole makes the leaf sessile; absence of the blade with a flat compressed pet- 

 iole makes the leaf a phyllodium. 

 Leaves are classified as follows: 



A. simple leaves. 



1. pinnately- veined : 



a. lower veins longest: linear, lanceolate, ovate, deltoid; 



b. middle veins longest: oblong, elliptic, oval, orbicular; 



c. upper veins longest: oblanceolate, obovate, cuneate, spatulate; 



d. lower veins curved: cordate, auriculate, hastate, sagittate; 



e. tissue deficient between the veins to halfway the midvein: pinnatifid, runci~ 



nate, lyrate; 



f. tissue deficient between the veins to near the midvein: pinnately-pdrted, sinu- 



ate; 



2. palmately veined: reniform, peltate, palmately-lobed, pedate, flabelliform or fan- 



shaped. 



3. parallel-veined: linear, ensiform or sword-shaped; — lanceolate and other forms of 



a. b. c. d.; — contracted forms as acerose or needle-shaped, subulate or awl- 

 shaped, scaly, etc. 

 4. forked-veined (dichotomous) in Pteridophytes. 



B. compound leaves. 



1. pinnately compound: 



a. one-foliate, if only one leaflet is articulated to the petiole; 



b. two-joliate or binate, with two leaflets on the petiole; 



c. tri-foliate or ternate, with three leaflets on the petiole; 



d. even-pinnate or equally pinnate or abruptly pinnate; 



e. odd-pinnate or unequally pinnate; 



f. interruptedly pinnate, if smaller pairs occur between the larger ones; 



g. bi-pinnate or twice pinnate; bi-ternate; 

 h. tri-pinnate or thrice pinnate; 



i. decompound, if the divisions go still further. 



2. palmately compound: ternate or 3-joliate, quinate or 5-foliate, septenale or 7-foliate. 

 The margin of a leaf may be entire, and it is said to have a hem when a vein runs 





