174 MINNESOTA r.OTANICAL STUDIES. 



Liagora paniculata J. Ac. Anal. Algol. 3:106. 1896. De Toni. 

 Syll. Algar. 4:96. 1897. 



Frond with a rugose-granulose calcareous incrustation, scarce- 

 ly interrupted at the apices, terete, and densely pinnately decom- 

 pound, with each branch forming a conical panicle ; lower branches 

 of the panicle often opposite, terminal apices conical, conspicuously 

 standing out above the branches of the panicle. 



Diamond Head, Oahu. April 12, 1895. (Heller 2132.) 



Plants 10-12 cm. high, 1.5 mm. thick at base; axis flattened 

 below on drying, terete above, coral red when fresh, covered with a 

 continuous rugose granular incrustation. Central cylinder in young- 

 er parts soft, composed of large cohering filaments, in older parts 

 larger, firmer, with many smaller secondary filaments surround- 

 ing the primary axis. The cortical branchlets as in L. cheyncana, 

 sparingly branched, of short cylindrical or slightly ovoid cells about 

 12-15x20-25 mic. 



Liagora subarticulataGRUNOW in Alg. Fidschi- Tonga und Sa- 

 moa-Inseln in Journ. de Mus. Godefifroy. 6:35. 1874. De Toni. 

 Syll. Algar. 4:97. 1897. 



PLATE XXIV. FIG. 14, 15. 



Frond thickish, dichotomously much branched, covered with 

 the exception of the shortly furcate tips with a thick continuous 

 calcareous crust, which is divided at intervals by very narrow fis- 

 sures thereby dividing the frond into longer or shorter joints. 



On reef at low tide. 



Laie point, Koolauloa, Oahu. June 18, 1900. (J. E. T. 1007) ; 

 Hanalei, Kauai. July 26, 1900. (J. E. T. 1221.) 



Frond up to 7 cm. in length, 1.25-1.75 mm. wide at the base, 

 about 1 mm. thick above the base, densely dichotomously branched, 

 the lower angles acute, the upper obtuse, often forming dense ir- 

 regularly globose masses. The tips of the branches are rounded 

 obtuse, often shortly furcate and uncalcified. The central strand 

 of the young branches is small, soft, consisting of rather closely 

 packed, large, elongated cells, 30-35 mic. in diameter. From these 

 cells arise the cortical branchlets and from the basal cells of the 

 latter arise small cylindrical filaments which sheath, and in the older 

 parts of the frond penetrate the central cylinder. The cortical 

 branchlets are somewhat stout, sparingly and irregularly dichoto- 

 mously or laterally branched without a definite corymbose head. 



