R I 



they may be harden'd to endure the 

 open Air by degrees ; and then, if 

 they are planned out into a very rich 

 Border, and in dry Weather duly 

 waterM, they will grow to a very 

 large Size, particularly the firft Sort, 

 which I have feen upward of ten 

 Feet high in one Seafon ; and thefe 

 Plants have produe'd a great Quan- 

 tity of Flowers and Seeds ; but 

 if you intend to preferve them 

 through the Winter, they muft ne- 

 ver be placed in the full Ground, 

 becaufe after their Roots have been 

 widely extended, there will be no 

 tra./planting them with Safety ; 

 therefore the bell way is to ftiift 

 them into larger Pots from time to 

 time, ab their Roots (hall require, 

 placing them in the open Air during 

 the Surnmer-feafon, in fome warm 

 Situation, where they may rema ; n till 

 Otiobtr, when they muft be remov'd 

 into the Houfe with other Exotic 

 Plants, obferving duly to water 

 them inWinter wnen they require it, 

 and let them have free Air in mild 

 Weather ; for they only require to 

 be proteded from Froft, and cold 

 Winds, fo that they will endure the 

 Winter in a warm Green - houfe 

 without any Addition of artificial 

 Warmth. 



The nrfi four Sorts will perfect 

 their Seeds the firft Seafon in this 

 Climate, provided they are fovvn 

 early in the Spring ; but the fifth 

 Sort will rarely produce any till the 

 fecond Year ; fo that there is a Ne- 

 ceifity of preferving this through the 

 Winter, otherwife it cannot be main- 

 tain'd in England. 



Thefe Plants deferve a Place in 

 every curious Garden for the fingu- 

 lar Beauty of their Leaves (notwith- 

 ftanding their Flowers are not very 

 valuable), efpecially thofe Sorts 

 which may be propagated every Year 

 from Seeds, became thofe Perfons 



K 1 



who have no Green-houfe to place 

 them into in Winter, may cultivate 

 them as other annual Plants; amongfl: 

 which thefe, being placed either in 

 Pots or Borders, afford an agree- 

 able Variety : but it muft be ob- 

 ferv'd, as thefe are large-growing 

 Plants, never to place them too near 

 other Plants of lefs Growth, becaufe 

 thefe will overbear and deftroy them; 

 and thofe which are planted in Pots, 

 mould be allow'd room for their 

 Roots to expand, and muft be fre- 

 quently water'd, otherwife they will 

 not grow very large. 



R1COPHORA, Yams. 



The Characters of this Genus of 

 Plants are not fufhciently delcribed 

 to afcertain what Gals it belongs 

 to; nor do thefePlants produceFlow- 

 ers in any of the European Gardens ; 

 fo that, unlefs the Flowers are exa- 

 mined by a ikilful Perfon in their 

 native Places of Growth, it will not 

 be known where to place it. 



Dr. Van Roytn, Profeifor of Bota- 

 ny at Leyden, has ranged thefePlants 

 under the Genus of Diofcona; but 

 from the imperfect Remains of fome 

 Flowers brought from America, it 

 appeared to me this mould not be 

 placed there. 



The S pedes are ; bamt 



1. RicoTHORAlndica, feu In 

 rubra, caule alato fcammonii, foliit 

 nervojis conjugatis. Par. Bat, Prod* 

 The red-ftall^d Yam. 



2. RlCOPHORA magnaVirgimana, 

 bryonitf nigrse modo 'volubilis \Jingulari 

 folio ner-vofo jiexili, caule tetragono, 

 ad angulos elato. Pluk. Almag. The 

 great Virginian Yam, with a fquare 

 Stalk climbing like Black-bryony, 

 and a fingle-ribb'd Leaf. 



There are fome other Varieties 

 of this Plant in the warm Parts of 

 the Eajl and IVefi-Indies ; but th* r e 

 two are the moft commonly culti- 

 vated for Ufe. Thefe Plants are 



wild 



