HITCHCOCK AND CHASE NOETH AMEEICAN PANICUM. 



83 



Fig. 72.— Distribution of P. bulbosuvi. 



rowly ovate, more finely transversely rugose than in P. maximum, the bluntly pointed 

 apex puberulent. 



The type specimen of P. bulbosum represents the medium form of this species, 

 which varies much in height, width of blades, and size of spikelets. Numerous 

 specimens intermediate between this and the subspecies sdaphilum occur; that is, 

 with the larger spikelets and narrower blades or smaller spikelets and wider blades. 



DISTRIBUTION. 



Moist places in canyons and valleys of the Rocky and Sierra Madre mountains. New 

 Mexico and Arizona to southern Mexico. 



New Mexico: Animas Valley, Mearns 2501; Black Range, Metcalfe 1422; Mangas, 

 Metcalje 80 in part; Burro Mountains, Rushy 445b; Las Vegas, Vasey in 1881; 

 White Mounains, W'ooton 368; 

 Organ Mountains, Standley in 

 1906. 



Arizona: Chiricahui Mountains, 

 Tourney in 1896 ; Rincon Moun- 

 tains, Nealley in 1891; Hua- 

 chuca Mountains, ZZoZzner 1966, 

 2079, 2163, Lemmon 2912, 2914, 

 2916; Santa Catalina Moun- 

 tains, Griffiths 7083; Walnut 

 Canyon, MacDougal 336; Bar- 

 foot Park, Blumer 1341; with- 

 out locality, Rushy in 1883. 



Mexico: Chihuahua, Hartman 790, Pringle 377, Nelson 6187, 6301; Sierra Madree, 

 Townsend & Barber 221; San Luis Potosi, Parry & Palmer 958; Durango, 

 Palmer 525a in 1896; Otinapa, Palmer 340 in 1906; Tejamen, Palmer 469 in 

 1906 in part; Rio Blanco, Palmer 207 in part and 207a in 1886; Puebla, Pur f us 

 2908; Eslava, Eolway 12, Pringle9575; Valley of Toluca, Pringle5207 (Hitch- 

 cock Herb.); State of Jalisco, Rose 2609; Valley of Mexico, Bourgeau 235, 

 PrmgfZe6418; Territorio de Topic, Rose 1999, 3361; Chinantla, Liebmann A^\, 

 442; Mount Orizaba, Bourgeau 2794, Seaton 317; Oaxaca, Conzatti & Gonzales 

 243, Nelson 1374. 



O 41a. Panicum bulbosum sciaphilum (Rupr.). 



Fanicum sdaphilum Rupr. ; Fourn. Mex. PI. 2 : 19. 1886. This name was listed with- 

 out description by Ruprecht,^ "Col. H. Gal[eotti] 

 no. 5759 * * * Yavezia" being cited, and 

 also by Hemsley.& Fournier cites "Sierra de 

 Yavesia, 7,000^ (Gal[eotti] n. 5759 in herb. Brux. 

 et Mus. Par.)" The type specimen is in the Brus- 

 sels Herbarium. 



Panicum bulbosum minor[us] Vasey, U. S. Dept. 

 Agr. Div. Bot. Bull. 8: 38. 1889. "(P. maximum, 

 var. bulbosum, Munro) " is cited and range is given 

 as "Texas, New Mexico, and Arizona." WJ3^fe*^ !^Jl.,JV\ Oyi 



2086 of the Mexican Boundary-Survey in the *^^ 7'' 

 NationtHSe^axium marked-'*^anicum maximum 

 Jacq. var. bulboB3^^'?5in. (fide Munro)" is taken 

 as the typer'since this is doublA^iSsthe basis of Vasey 'a 



understanding of Munro's use oi^UbxfnsLine cited. This combina^Ton was earlierc 



listed without description by Vasey. 



Fig. 73.— p. bulbosum sciaphilum. 

 From type specimen. 



U^ 



1^ 



a Bull. Acad. Roy. Belg. 9^: 240. 1842. 

 b Biol. Centr. Amer, Bot. 3 : 496. 1885. 



cGrassesU. S.ll. 1883. 



