to collapse^ before that they had been a very long while exposed for the access of the 7nale 

 farina* 



And, lastly, when these virgiri plants began to be affected wdth age, I diligently searched 

 along with several botanists for all the calyxes, and I found these large and flourishing, but the 

 seeds, as many as w^ere found, were yellow, compressed, membranaceous, dry, not exhibiting 

 the slightest trace of cotyledons or pulp.f 



THIRD EXPERIMENT. 



The Clutia Pulchella [Broad-leaved Clutia) was also, during the months of June and 

 July, kept in the same window of my room. 



The 7nale and fema/e plants were in different pots. 



The female in consequence abounded in fruit, and indeed, not a single flower dropt 

 abortive. 



Then I separated the pots to diflferent windows in the same room, nevertheless, all the female 

 flowers produced perfect fruit. 



I lately removed the male altogether, and only left the female plant, having first removed all 

 the former, and newly expanded, flowers. 



From the axilla of each leaf there daily appeared fresh ones, which remained for the space 

 of eight or twelve days, but afterwards the peduncles turning yellow, they fell oflf empty of 

 fruit. 



A friend, a botanist, who was delighted with this experiment with myself, one day per- 

 suaded me, that I should bring a sirigle male flower from the stove in the garden, which he 



* Linnaeus elsewhere observes, <' The act of flowering seems greatly to exhaust the living principle. In the moth and butterfly it may 

 be observed, how after marriage the wings droop, and life expires. But if this butterfly be confined like a nun in a convent it will survive 

 many months. So annual plants will become biennial; if they do not happen to blow the first year, they will resist the cold of winter as 

 the pinks, lychnises, &c. even to the third winter, but once having blown, they soon after perish. ' 



The MusA {Plantain) often lives to an hundred years: but having once opened its flowers, no art or experience teaches how to save this 

 superb plant from perishing that same year. 



The CoRYPHA {Fan Palm) was sterile for thirty-five years, and grew to the height of seventy feet, and in four months it rose to thirty 

 teet in height, and produced fruit that same year, which being accomplished, the whole plant died. Hort. Cliff". 482 



The La V ATERA Arborea {Tree Lavatera) rises to the height of a pear-tree, supporting readily the colds of winter, but having once out 

 forth any blossom, neither the friendly hand of the gardener, nor stoves, nor attention, can save it from perishing in the coming winter 

 Lin. Amaen. Acad. Tom. i. 375. j- o 5 wiulci. 



The same remark holds good as respects the Agave Americana {American Aloe) ; vide the description accompanying our Picturesque 

 Botanical Plate of that superb plant. r ./ b ^.tuicoi^uc 



Hence it is that all double flowers last so much longer than single, and that tulips deprived of their anthers retain for a great while their 

 corolla-leaves. => vvnnc lucu 



t This experiment of the Hemp has been repeated by Spalanzani, and a contrary condusion drawn; hue the plants erew in nlar., 

 where cordage was made, and where Hemp was cultivated in the neighbourhood-but in sequestered spots in the country wherl I have 

 prosecuted these expenment, the results have been exactly as recorded by Linneeus. Vide our " Philosophy of Botany Ai^JJllZ" 

 nments of Spalanzani, and the confutation of them, will be recorded at considerable length. Care however must h /^""^'^ ""^ "P^" 

 female Hemp no ,nahs are found interspersed amongst the fetrmle flowers, a common Lusus Nature; and even it has bee! ""' 7 u 



a/em«Zepia«( has in course oftime produced only mafe>,oer», and <,/cet.ersA John Biuhine (Hist Plant torn i 7V,^^T"X' u 

 whole fructification of a Pa^m, which he saw growing at Montpelier, and which not only produced branches of mai,,.' flowers hl,TT , 

 ones bearing dates. Rav tells us in his History of Plants, (vol. ii. p. 13M.) that he himself saw, many yea s af^ tWs saT; ''f r^"™'" 



mentioned by Bauhine. This variety in the fructification ha, been noticed by several other authors. Therrnt J.ltrin h n 

 (Chap. ,v. p. ,„..), mentioning that class of trees which are male and female i„ different parts of the same eesavs" That" ^^"7'^ 

 trees, when they have for many years produced flowers without fruit, afterwards sometimes will produce fru ti ho .'t fln 1 " ° 



thtnks, " should be farther enquired into." This, since Jungins's time, has been done, and it has been found Th 7 u ' . 



this class are wholly male, while young : but as they advance in age, thev have flower of both sZeTZdZlt d /°"'"'"=^ "!■= f'^ f 

 Th,s tact M,..„ has frequently htmself observed in the jy^K.^.^-^.-.e; and the Cheva r Tat; /fZut "r''^ ^■^'''":'''- 



whatever relates to botany, has observed, that a large L..,x,scus (,lL/,c/, Tree) in his gardcr™!' ! ' T h "1 .'' T '" 

 flowers, but that for three years past, it had also produced plenty of fruit. •* - " ''"' P"''''""'' °"'-^' '""'" 



placed 



