118 THE BOTANISTS OF PPIILADELPHIA. 



the Lewis and Clark expedition was made at his house. 

 M'Mahon was the author of " Tlie American Gardener's 

 Calendar," published in 1806, a second edition in 1819, 

 and an eleventh, revised by John Jay Smith, in 1857. 

 Malionia, a genus of handsome evergreen shrubs of West 

 North America, was named in his honor by Thomas Nuttall. 



M'Mahon's Garden was founded in 1811, about three 

 miles north of Philadelphia (in the neighborhood of 11th 

 and Cumberland Streets). The committee appointed by 

 the Pennsylvania Historical Society visited the garden in 

 1830, kept by Mrs. M']\lahon, after the death of her husband, 

 the founder, and reported the collection good. 



" Here is the largest Portlandia that we have seen, and 

 a good selection of the succulent family, with many oranges, 

 lemons, shaddock, etc., and splendid magnolias ; the macro- 

 phylla, grandiflora, etc. A very large tree of Madura 

 aurantiaca or osage orange ; a highly ornamental tree, with 

 bright green foliage, and standing longer in the fall than 

 any other of the deciduous tribe. It bears a large green 

 fruit, not unlike an orange. We think that Mr. M'Mahon 

 was the first to introduce this tree, brought back by Lewis 

 and Clark. Here we saw an uncommon large shrub of the 

 Lonicera tartarica, or tartarian honeysuckle ; it is twenty 

 feet in diameter, and high in proportion. 



" The ground contains about twenty acres, distributed 

 in nursery stock, and growing vegetable seeds. 



" Those two beautiful shrubs, the Symphoricarpos 

 racemosus and Ribes aureum, were propagated in this 

 nursery before any other in our vicinity ; and this was the 

 case, too, with many other shrubs and trees. Of European 

 trees there are several valuable specimens, such as Fraxi- 



