8 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Triodia pulchella H. B. K. Nov. Gen. & Sp. 1: 155. pl. 47. 1815. 
Type locality, “In subfrigidis, siccis, apricis regni Mexicani inter Guanaxuato, 
Mina de Bel grado et Cubilete, alt. 1050 hexap.” 
Agua Dulce, November 11, 1907, MacDougal. 
Hesperocallis undulata A. Gray, Proc. Amer. Acad. 7: 390. 1868. 
Type locality, “Desert plains at Jessup Rapids, Arizona.” 
This was seen at Walls Well, in southern Arizona, but no specimens were collected. 
The plant is commonly known as “‘ajo,”’ and it is from this plant that the Ajo Range 
receives itsname. The word signifies ‘‘garlic”’ and the roots are said to have a strong 
alliaceous flavor. 
Momisia pallida (Torr.) Planch. in DC. Prodr, 17: 191. 1873. 
Celtis pallida Torr. Bot. Mex. Bound. 203. 1859. 
Type locality, ‘In western Texas and along the Rio Grande from Fort Duncan to 
the Gulf and west to Magdalena, in Sonora.”’ 
Walls Well, Ajo Mountains, Arizona, November 7, 1907, MacDougal 8. 
There are three other species of the genus Momisia in Mexico for 
which the proper names seem not to have been formed. They may, 
for convenience, be entered here. 
MomIsIA ANFRAcCTUOSA (Liebm.) Rose & Standley. 
Celtis anfractuosa Liebm. Vidensk. Selsk. Skr. V. 2: 338. 1851. 
Type locality, ‘“Xalcomulco, Vera Cruz.”’ 
MoMISIA PLATYCAULIS (Greenm.) Rose & Standley. 
Celtis platycaulis Greenm. Proc. Amer. Acad. 39: 78. 1903. 
Type locality, “State of Morelos; volcanic hills near Yautepec.”’ 
MomIsIA IGUANAEA (Jacq.) Rose & Standley. 
Rhamnus iguanaea Jacq. Enum. Pl. Carib. 16. 1762. 
Celtis aculeata Swartz, Prodr. Veg. Ind. Occ. 53. 1783. 
Mertensia laevigata H. B. K. Nov. Gen. & Sp. 2: 31. pl. 103. 1817. 
Momisia aculeata Klotzsch, Linnaea 20: 539. 1847. 
Celtis iguanaca Sarg. Silva N. Amer. 7: 64. 1895. 
Type locality, West Indies. 
Phoradendron californicum Nutt. Journ. Acad. Phila. n. ser. 1: 185. 1847, 
Type locality, “‘In the mountains of upper California. Parasitic on the trunks 
and branches of a Strombocarpus.”’ 
Pinacate Region, November, 1907, MacDougal. 
In his account of the trip Doctor Hornaday writes as follows concerning this plant:! 
“Throughout our trip we found the large mesquite trees of the valleys and flood 
plains grievously afflicted with mistletoe. It usually appears as a great, dark-colored 
bunch 2 feet in diameter, and sometimes we found a dozen clumps in one tree. 
This parasite, like most others, is destructive when overdone. We saw many hapless 
trees that had literally been murdered by it and were only lifeless stubs. It was in 
the valley of the Sonoyta River, near Agua Dulce, that Doctor MacDougal photo- 
graphed a wide-spreading mesquite whose top was so overloaded with mistletoe that 
it looked as if a small load of clover hay had been pitched into it.”’ 2 
Eriogonum fasciculatum Benth. Trans. Linn. Soc. 17: 411. 1837. 
Type locality, ‘‘Upper California.” 
Walls Well, Ajo Mountains, November 5, 1907, MacDougal 9. 
'Camp-Fires on Desert and Lava, page 48, 
? For illustration of this tree, see plate opposite page 48 of the ‘‘ Camp-Fires.”” 
