HITCHCOCK AND CHASE NORTH AMERICAN PANICUM. 



129 



DISTRIBUTION. 



Sandy soil, Louisiana, Texas, and Oklahoma. 



Louisiana: Oberlin, Ball 220; 

 Lake Charles, Chase 4389; 

 without locality, Hale (Hitch- 

 cock Herb.). 



Texas: Jacksonville, Joor in 1884, 

 Plank 22, 60; Grand Saline, 

 Reverchon 2223; Paris, Heller 

 4221; College Station, Nealley 

 in 1882; Galveston, Joor 3648; 

 Industry, Wurzlow 9; Mar- 

 shall, Bush 979; Tyler, Rever- 

 chon 2224 ; Harvester, Thurow 

 in 1898; without locality, 

 Nealley in 1885. 



Oklahoma: Sapulpa, Bush 738 (Gray Herb.) 



Fig. 124.— Distribution of P. brachyanthum. 



Trichoidia. — Annuals, decumbent at base and rooting at the lower nodes, rather 

 freely branching; blades oblong-lanceolate to ovate; panicles short-exserted 

 or included at base until maturity, very diffuse, the numerous branches, 

 branchlets and long pedicels capillary; spikelets minute, not over 1.4 mm. 

 long; fruit minutely papillose, the margin of the lemma flat. 

 Blades more than one-fourth as wide as long ; spikelets 



pubescent 73. P. trichoides. 



Blades less than one-eighth as wide as long; spikelets mi- 

 nutely bullate-rugose 74. P. trichanthum. 



73. Panicum trichoides Swartz. 



Panicum, trichoides Swartz, Prodr. Veg. Ind. Occ. 24. 1788. " Jamaica, Hispaniola." 

 Swartz cites Sloane's plate 72, figure 3, but does not quote his diagnosis, hence the 

 type a is not the Sloane plant, which belongs to the same species, but the plant in the 

 Swartz Herbarium labeled "trichoides fl. ind. occ." from "Jamaica, Swartz." 



Panicum capillaceum Lam. Tabl. Encycl. 1: 173. 1791. Lamarck gives for the 

 locality "Amer. merid." and cites Sloane's plate 72, figure 3. The type, in the 

 Lamarck Herbarium, was collected in Porto Rico by Le Dru. Persoon, & while quoting 

 Lamarck's diagnosis, gives the name as "Capillaceum (filamentosum) .' ' The second 

 word does not seem to be meant either as a change of name or as a variety. What the 

 author intended is not apparent. 



Panicum acutifolium Willd.; Spreng. Syst. Veg. 1 : 320. 1825. This is given as a 

 synonym under P. capillar e and is credited to "W. herb." The type, in the Willde- 

 now Herbarium, was collected by Humboldt at Cumanacoa. 



Panicum capillaceum strictius Doell in Mart. Fl. Bras. 2 2 : 249. 1877. li In Prov. 

 Piauhyensi {Gardner n. 3509) : " This specimen we have not seen. 



This species has usually been referred by authors of American floras to P. brevifolium 

 L., which is from India, and is the same as P. ovalifolium Poir. as described by Hooker, c 

 and a very different species. 



a See Hitchcock, Contr. Nat. Herb. 12: 140. 1908. 

 &Syn. PL 1:83. 1805. 

 cFl. Brit. Ind. 7:44. 1896. 



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