TERMS.] DURATION. 369 



7. Often-bearing (t muUiferus) ; when any thing is produced several times in 

 one season. 



Besides the foregoing, those that follow require explanation : 



1. Of an hour (horarius) ; which endures for an hour or two only ; as the 

 flowers of Talinum, Cistus, &c. 



2. Of a day (ephemerus, f diurnus) ; which endures but a day, as the flower of 



Tigridia. Biduus is said of things that endure two days ; and triduus, 

 three days. 



3. Of a night (noctumus) ; which appears during the night, and perishes before 

 morning ; as the flowers of the night-blooming Cereus. 



4. Of a month (menstrualis, f menstruus) ; which last for a month. Bimestris 

 is said of things that exist for two months ; trimestris, for three months. 



5. Yearly (annotinus) ; that which has the growth of a year. Thus rami 

 annotini are branches a year old. 



6. Of the same year (Jiornus), is said of any thing the produce of the year. 



Thus rami horni would be branches not a year old. 



7. Deciduous (deciduus) ; finally falling off ; as the calyx and corolla of 



Cruciferse. 



8. Caducous (caducus) ; falling off very early ; as the calyx of the Poppy. 



9. Persistent (persistens, ^restans, Linn.) ; not falling off, but remaining green 

 until the part which bears it is wholly matured ; as the leaves of evergreen 

 plants, the calyx of Labiatse and others. 



1 0. Withering, or fading (marcescens) ; not falling off until the part which bears 

 it is perfected, but withering long before that time ; as the flowers of 

 Orobanche. 



11. Fugacious (fugax) ; falling off, or perishing very rapidly ; as many minute 



Fungi, the petals of Cistus, &c. 



12. Permanent (perennans) ; not different from persistent : it is generally 



applied to leaves. 



13. Perennial (perennis) ; lasting for several years. 



7. Of Colour. 



The most useful books to consult for the distinctions of colours are Syme's 

 Book of Colours, and the chromatic scale in the Duke of Bedford's publication 

 upon Ericas. 



The best practical arrangement of colours, as applied to plants, is that of 

 Bischoff, in his excellent Terminology ; what follows is chiefly taken from that 

 work. 



There are eight principal colours, under which all the others may be arranged ; 

 viz. white, grey, black, brown, yellow, green, blue, and red. 



I. White (albus ; in words compounded of Greek, leuco-). 



1. Snow-white (niveus)', as the purest white ; Camellia japonica. 



2. Pure white (candidus ; in Greek composition, argo-) ; very pure, but not so 



clear as the last ; Lilium candidum. 



3. Ivory-white (cream-colour ; elurneus, eborinus) ; white verging to yellow, 



with a little lustre ; Convallaria majalis. 

 VOL. II. B B 



