80 



Isachne pauciflora Hack. nov. spec. 



Perenni-s. Culmi natantes vel in solo valde uliginoso radicantes, humifusi, 

 ramosi, ramis iioriferis glaberrimis, apice longiuscule nudis. Vaginae laxse, 

 internodiis breviores, liirsutse, ad nodos barbatse, ore longe ciliatae. Ligula 

 brevissima, truncata, pilis stipata. Laminae ovato-lanceolatse, acutae, 1-1.4 

 cm. longae, circiter 4 mm. latae, rigidulse, virides, utrinque (praesertim 

 supra) setulis adspersse, margine vix incrassato, scabrse, tenuinorvis. Pan- 

 icula paupera, 1-1.5 em. longa, stricta, contracta, rliachi ramisque Isevibus 

 rigidulis, his alternis, 3-4, brevibus, subereetis, inferioribus 2-3 spiciilatis, 

 superioribus 1-spiciilatis. Spiculae pedicellis quani ipsae pauUo longioribus 

 vel eas subaequantibus, Ifevibus, apice liaud incrassatis fultse, subglobosae, 

 2 mm. longse, sordide virides. Glumae sterilis spiculam aequantes, inter 

 se aequales, late ovales vel obovato-ovales, obtusae vel II obtuse apiculata, 

 versus apicem parce setulosa-, ad 2 mm. longae, 7-nerves. Glumae fertiles 

 inter se longitudine structuraque aequales, 1.8 mm. longae, late ovales, 

 obtusissimae, albo viridulse, punctato-scabrae et dense puberula^, Hore atra- 

 que fertili. Palea glumae similis, sed planiuscula. 



Baguio, Benguet, Luzon (648G Elmer), June 1904, natans vel in solo 

 valde uliginoso. 



Videtur affinis /. myosoti Nees, quae (ex descr.) differt foliis vaginisque 

 e tuberculatis hirsutis, spiculis minimis (vix magnitudin sem. Papaveris) 

 glumae sterilibus oblongis patentissimis. 



Panicum caudiglume Hack. Oesterr. Bot. Zeitscli., 51:428. 1901. [Pani- 

 cum n. sp. ? affinis Panico trachyrhachidi Bentli., Mez. in Perk. Frag. 

 Fl. Philip., 144. 1904.) 



This species is represented by No. 832 Merrill, San Antonio Bay, Paragua, 

 February, 1903, specimens old and in poor condition, and No. 3307 Merrill, 

 Lamao River, Province of Bataan, Luzon, October, 1904. The former num- 

 ber in sandy open soil on the seashore, the latter rather common in the 

 borders of dry thickets. Java. 



Panicum humile Nees in Steud. Syn. Gram., 84, 1855; Hook. f. Fl. Brit. 

 Ind., 7:48, 1897. 



A species not previously known from the Philippines, represented by 

 No. 3623 Merrill, Concepcion, Province of Tarlac, Luzon, November, 1904. 

 Distribution. Borneo to Ceylon, Punjab, Assam, Bangal, Sikkim, etc. 

 Panicum didactylum Kunth, Rev. Gram., 1:33. 1835. § Digifaria. 



This species, reduced by many authors to Panicum sanguinale Linn., is 

 represented by No. 5634 Elmer, Bauang, Province of Union, Luzon, Feb- 

 ruary, 1904. Said by the collector to be common in waste places. 

 Ichnantfius pallens (Sw.) Munro, in Benth. Fl. Hongk. 414. 1861. (Pani- 

 cum fallens Sw. ; Panicum nitcns Merr., Govt. Lab. Publ. 17:8. 

 1904.) 



This widely distribvited species has not previously been reported from 

 the Philippines, Panicum nitens ]Merr., being identical with Ichnanthus 

 pallens Munro, the genus Ichnanthus being distinguished from Panicum 

 only by the appendaged base of the flowering glume. Mount Mariveles, 

 Province of Bataan, Luzon (3221 and 2756 Merrill). 



