Cohort 



eollicnlose 



Co'hort, Co'hors (Lat., a band of 

 soldiers), a group of orders, forming 

 an Alliance. 



coinop'odus + {kolvSttovs, with common 

 foot), terminating downwards in a 

 cone, as most embryos ; Lindley also 

 spells it coenop^dus. 



Colchicine, an alkaloid yielded by 

 Colchicum autumnale, Linn. 



Co'iein, the red colouring-matter of 

 Coleus Verschaffcltii, Leiu. 



Colench'yma = Collenchyma. 



Coreogen («oA.ebs, a sheath ; yevvau), I 

 bring forth), a ring-shaped gi'oup 

 of cells, surrounding the mestome 

 of Bicksonia, etc. (Haberlaiidt) ; 

 Coleophyrium {(pvWov, a leaf), the 

 first leaf in germination of mono- 

 cotyledons, which sheathes the suc- 

 ceeding leaves. 



coleop'teroid (Coleopteron, elSos, re- 

 semblance), resembling a beetle or 

 tick, as the seeds of many Euphor- 

 biaceae (S. Moore). 



Coleop'tilum (/coAebs, a sheath ; tttIKov, 

 a feather) = Coleophyllum ; Coleo- 

 rhi'za i^iCa, a root), the sheath of 

 a monocotyledonous embryo, when 

 pierced by the true radicle ; adj. 

 coleorhiza'tus ; Col'esule, Cohs'ula; 

 a membranous bag-like organ en- 

 closing the sporangium of Hepati- 

 cae, the perichaetial sheath, usually 

 termed the Vaginule. 



coUap'sing, used by Babington for 

 the form compared to a painter's 

 pencil, assumed by the submerged 

 leaves of some aquatic plants when 

 taken out of the water ; Collap'sion, 

 Collap'sio (Lat., falling together), 

 the act of closing or falling to- 

 gether. 



Collar, CoVlum (Lat,, neck) ; (1) the 

 ' ' neck " of a plant, the imaginary 

 boundary between the above- and 

 underground portion of the axis ; 

 (2) the annulus in Agarics ; (3) an 

 encircling outgrowth at the base of 

 the ovule in Ginkgo (Potter). 



Colla're + (Lat., a collar) = Ligule. 

 collat'eral {coVlatero, to admit on 

 both sides), standing side by side ; 

 '~ Bun'dles, those having a single 



strand of bast and wood, side by side, 

 and usually in the same radius ; 

 BICOLLA.TERAL BuNDi.ES are a vari- 

 ation on this type, having two of 

 one element to one of the other ; 

 -^ Cho'risis, see Chokisis. 



collecting {collect'io, a gathering to- 

 gether) Cells, are roundish cells at 

 the base of palisade tissue, destitute 

 of chlorophyll and densely filled 

 with protoplasm ; in German *' Sam- 

 meiizellen " ; -- Hairs, hairs on the 

 styles of some Compositae serving 

 to collect the pollen on its discharge 

 from the anthers ; collective Fruits, 

 the aggregation of the fruits of 

 several flowers into one mass, such 

 as the mulberry ; --' Spe'cies, a 

 super-species, an assemblage of sub- 

 species ; CoUect'ors, Collector'es, the 

 hairs of certain styles, as in Cam- 

 panula, which collect or brush out 

 the pollen from the anthers ; cf. 

 Collecting Hairs. 



Collench'jnna {k6\\i, glue ; Hxyuna, 

 an infusion) ; (1) parenchymatous 

 cells with cellulose walls usually 

 elongated, forming strands of grea^ 

 strength under the epidermis, thick- 

 ening in angles, etc. ; (2) the cel- 

 lular matter in which the pollen 

 is formed, usually absorbed, but 

 remaining and assuming a definite 

 form in some plants, as in Orchids, 

 or delicate threads, as in Oenothera 

 (Lindley) ; — Bast '^ , thickening 

 chiefly involving the whole wall ; 

 Cartilage -^j walls thickened all 

 round with sharply differentiated 

 inner lamella ; Met'a- '-' , caused by 

 slow death of the cell, and metamor- 

 phosis of the cell-wall ; Plate '^ , 

 a form which resembles the true 

 hard bast ; Rift -' , portion of wall 

 bordering on an intercellular space 

 alone thickened ; collenchymatlc, 

 coUenchym'atouS, relating to Col- 

 lenchyma. 



Collet = Collar. 



CoUe'ter (/coA\7jtJ>j, gUied), mucila- 

 ginous hairs on the buds^ of many 

 phanerogams which secrete gum. 



collic'alose, colliculo'sus {collicidus, a 



84 



