E 
52 Rhodora [APRIL 
M. borneense (C. B. Clarke), n. comb. Cladium borneense C. B. 
Clarke in Stapf, Trans. Linn. Soc., Bot. Ser. 2, iv. 245 (1894). 
M. californicus (Watson), n. comb. Cladium Mariscus, var. Cali- 
fornicum Watson, Bot. Cal. ii. 224 (1880). 
A beautifully distinct species extending from southern Nevada 
and southern California to the State of San Luis Potosi in Mexico. 
M. serratus (Cladium Mariscus) has widely creeping rootstocks 
and stolons; M. californicus is cespitose, forming hummocks described 
by Brewer as “114 to 2 feet thick" (Brewer, acc. to Watson l. c.), 
while Jepson describes the plant as having "Stems numerous, stout, 
6 to 10 feet high, forming very dense and heavy hummocks” (Jepson, 
Fl. Cal. 206). In M. serratus the erect inflorescence has glomerules 
of many spikelets; in M. californicus the diffuse drooping pan- 
icle has fewer (mostly 2-5) spikelets in a glomerule. In the 
European species the lustrous lance-ovoid achenes taper from near 
the middle very gradually to the apex; in M. californicus they are 
lustrous but of a broad cylindric-ovoid outline, with a very short 
tip. Besides the stations, San Gabriel, California and “Southern 
Nevada” originally given by Watson, Jepson cites others, at the 
bases of the San Gabriel and San Bernardino Mountains. Additional 
stations are as follows. New Mexico: along Pecos River, near 
Roswell, D. Griffiths, no. 5765, distributed as Cladium effusum. 
Mexico: border of water, Las Tablas, San Luis Potosi, Pringle, no. 
5036; common in deep rich soil along the border of Media Luna, near 
Rio Verde, San Luis Potosi, Palmer, no. 62 (June, 1904). 
M. capillaceus (Hook. f.), n.comb. Chaetospora capillacea Hook. f. 
Fl. Tasm. ii. 81. t. CXLI. A (1860). C. capillaris F. Muell. Fragm. 
Phyt. Austral. ix. 34 (1875). Elynanthus capillaceus (Hook. f.) Benth. 
Fl. Austral. vii. 377 (1878). Schoenus capillaris F. Muell. Second 
Cens. Austr. Pl. 215 (1889). Schoenus tenuis T. Kirk, Trans. N. Z. 
Inst. ii. 94 (1871). Cladium capillaceum (Hook. f.) C. B. Clarke in 
Cheeseman, Mem. N. Z. Fl. 789 (1906). 
M. chinensis (Nees), n. comb. Cladium chinense Nees, Linnaea, ix. 
301 (1835) and Nov. Act. Nat. Cur. xix. Suppl. i. 116 (1843). C. 
japonicum Steud. Syn. Pl. Cyp. 152 (1855). 
Although referred by most recent authors to the European species, 
M. chinensis has very much smaller spikelets, as originally pointed 
out by Nees, and its pale achenes, only about one-third as large as 
in M. serratus are ellipsoid-ovoid and very short-tipped, rather 
than lance-ovoid and acuminate. Material of the Japanese plant 
with mature fruit is apparently inseparable from M. chinensis. 
