malaceoos 



Mesomitosis 



by Thurston when referring to 

 Rosaceae, etc. 



manifest {manifestus, palpable), 

 anthers visible at the mouth of the 

 corolla-tube, but neither inserted 

 nor exserted. 



Man'ocyst (/iavo?, rare ; Kvaris, 

 pouch), the receptive papilla pro- 

 truding from the oogonium of 

 Pht/tophthora De Bary (Murphy); 

 manoxyric (^vXov, wood), the 

 cycadean type of wood (Seward) ; 



Cf. PYCNOXLIC. 



Mantle* Trache'ary, of Stephana- 

 spermum Brongn. in the wall of 

 the nucellus ending in the pollen- 

 chamber (Jeffrey). 



Maqui' (Fr.), cf. Macchia. 



mastigoclad'oas (kAciSo?, a branch), 

 flagellate, having runners (Russow). 



Mates, synap'tic, leptotene-threads 

 (Hurst). 



matroclin'ic, -ous {kXivt], a bed), in 

 hybrids, a quality derived from 

 the ovular or female parent ; cf. 

 PATROCLiNic; Mat'rocliny is the 

 condition. 



Mat'tae, pi. (Mod. Lat.), mats or 

 plants which form matted growths 

 (Clements). 



matteuc'coid, like the fern genus 

 Maiteuccia Todaro (Bower). 



me'dian, add, ^^ anter'ior, in phyllo- 

 taxis, the first sepal ; --' posterior, 

 the second sepal in the quincuncial 

 calyx (Church). 



Medullary Fis'tula, cf. Fistula, 

 Medtjllary. 



Megalophyl'la {<f)vXXov, a leaf), leaves of 

 extreme size; Megalophyl'ly, bipin- 

 nation of fern frond (Church) ; Meg'- 

 aphyll (1) Raunkiaer's term for 

 his largest leaves; (2) Benson's 

 Meiophyll and MERrPBTSTLL taken 

 together; adj. megaphyl'lous ; 

 Megaplank'ton (+ Plakkton) ; cf. 

 Pleuston ; Meg'aphytes {(f>vT6v, 

 a plant), spermophytes ; Mega- 

 soro'ma {acopevfia, a heap), the 

 sporangial apparatus of the vas- 

 cular plant, with its receptacle 

 or stalk (Benson) ; Megaspor'ophyll 

 {-{- Spoeophyll), the female cone 



of cycads; Megastrob'ilos (-f 

 Strobilxjs), the female flower and 

 cone of Cycds Linn, and its allies ; 

 Meg'atherms {depfirj, heat), plants 

 which need high temperature for 

 active growth; Megazold (^oiov, 

 an animal), a female gamete of 

 algae (Sauvageau). 

 Meiocyc'lic {kvkXos, a circle), " an 

 isostemonous bicarpellate construc- 

 tion, tetracyclic or more conveni- 

 ently mesocyclic " (Church) = a 

 smaller circle; Meio'phyll (<^uAAov, 

 a leaf), a simply elaborated leaf, 

 as in Pseudobornia Nath. (Benson); 

 Mei'ospore [or Me'ospore] (-f- 

 Spore), the product of a Meio- 

 SPORANGE ; arising through an 

 ontogenetic reduction (Janet). 

 Me'matea, a misprint for Nematea. 

 Men'del, fifty units distance of gene 

 from chromosome, a measure of 

 length equivalent to fifty per cent, 

 of crossing over (D. F. Jones), 

 name derived from Grigor Mendel. 

 Menyanthe'tum, an association of 



Menyanthes Linn. 

 Mer'id (/^ept'sr, fj.€pi8os, a part),an assem- 

 blage of plastids formed by succes- 

 sive divisions from one original ; it 

 may be solitary or colonial (Janet) ; 

 Mer'iphyll {<f>vXXov, a leaf), " the 

 complex meriphytic leaf of the ferns, 

 leading to Angiosperms" (Benson) ; 

 meriphyt'ic, divided, ka many plants 

 are ; Mer'ism, a primordial assem- 

 blage of cells (Janet). 

 merogon'ically [n-^pos, a part; yovos, 

 race), monopolizing the sexual 

 portion; Merog'ony, the condition 

 itself. 

 Mesench'ym (eyxc'tu, I pour in), tissue 

 which separates xylem and phloem 

 elements in root-bimdles (Clements); 

 Mes'eosere (+ Sere), a mesophytic 

 eosere ; it corresponds to the Eozoic 

 Period of geology ; also termed 

 Gymneosere {id.); Mes'eostrate (+ 

 Strate), a mesophytic eostrate 

 [id.); Mes'ocline, a moist, cool, 

 slope {id.); Mesomito'sis (4- Mi- 

 tosis), mitosis within the nuclear 

 membrane, without co-operation 



449 



