HENDERSON'S HANDBOOK OF PLANTS. 



ACK 



1. Characece. Spores solitary. 



2. Eicciacece. Capsules valveless, with- 

 out spiral cells or elaters. 



3. March antiacecK. Capsules depend- 

 ent, containing elaters. 



4. Jungermanniacece. Capsules erect, 

 containing elaters. 



5. Musci. Capsules mostly valveless, 

 without elaters. 



In these five orders the archegones give 

 rise to the capsule. 



6. Filices. Capsules mostly with an 

 elastic ring, but sometimes densely 

 crowded and ringless. 



7. Ophioglossacece. Capsules ringless, 

 bivalvate. 



8. Equisetacece. Capsules dependent. 

 Coat of spores spiral. 



9. Marsileaceae. Capsules multilocular. 



10. Lycopodiacece. Capsules axillary, 

 unilocular. 



In these five orders the spores produce 

 a prothalliuni bearing archegones, which 

 yield new plants and not capsules. For 

 further details see Berkeley's Cryplogamic 

 Botany, p. 421. 



Acrospire. The first leaf that appears when 

 corn sprouts. It is a developed plumule. 



Acrostichece. A section of polypodineous 

 Perns, in which the sori occupy almost or 

 quite the whole fructiferous surface, and 

 are not confined to distinct and determi- 

 nate points of the veins. 



Aculeate. Furnished with aculei or prickles, 

 as distinguished from spines. 



Aculei. The plural of Aculeus, which see. 



Aculeus. A prickle; a conical elevation of 

 the bark or skin of a plant, becoming 

 hard and sharp pointed, as in the Rose. 

 Aculei, or prickles, proceed from the 

 bark; spines or thorns proceed from the 

 wood. The former fall off when ripe ; 

 the latter do not. 



ADU 



Acuminate. A term applied to leaves or 

 other flat bodies which narrow gradually 

 till they form a long termination. If the 

 narrowing takes place towards the base, 

 it is so stated, as, acuminate at the base ; 

 if toward the point, the term is used 

 without qualification. 



Acute. Terminating abruptly in a sharp 

 point. 



Acutangular. Having sharp or acute angles. 

 Sometimes used also where the leaves are 

 divided into many narrow lobes. 



Adelphia. A fraternity; a Linnsean term 

 denoting a collection of stamens. Mona- 

 delphia means one such collection; Dia- 

 delphia, two such collections, and so on. 



Adelphic. When the stamens are united by 

 their filaments into one bundle, as in the 

 Mallow ; or more, as in Hypericum. 



Adelphous. United in pairs or bundles by 

 filaments ; as, adelphous stamens. 



Adherence. The complete union or graft- 

 ing together of parts, which originally, or 

 in their nascent state, were distinct. 



Adglutinated.See Agglutinated. 



Adiantece. A section of polypodiaceous 

 Ferns, in which the receptacles to which 

 the spore cases are attached, are placed 

 on the under surface of the mdusium it- 

 self, so that the fructification is, as it were, 

 upside down, and is hence said to be re- 

 supinate. 



Adnate. Adhering; growing to anything 

 by the whole surface ; when an ovary is 

 united to the side of a calyx it is adnate. 

 Applied to parts of different whorls ad- 

 herent one to another, and to anthers 

 when they are attached to the filaments 

 by their whole length. 



Adpressed. Brought into contact with any- 

 thing without adhering. 



Adult. The full-grown of anything ; full- 

 grown leaves are adult leaves. 



