396 DR. A. B. EENDLE—SYSTEMATIC 



Var. MiCROCARPA, A. Br. in Joiirn. Bot. ii. (1864) 276. 



Var. BoUei, K. Schum. in Mart. Fl. Bras. iii. pt. 3, 725 (1894). 

 Minor, breviter ramosa, foliis anguste linearibus, dentibus, nisi inter flores, ssepe laminae 

 latitudinem baud a^quantibus ; fructu minimo. 



Leaves 1 to 1-9 cm. long, 5 to "8 mm. broad, witb 5 to 7 teeth on each side, Avhicb, 

 except OQ the small branchlets, do not equal in length the leaf- width ; generally 3 teeth on 

 the back of the blade, and 1 to 3 rather prominent teeth on each shoulder of the sheath. 

 Seeds deep reddish-brown, 2*5 mm. long by 1'5 mm. broad, oblong from an obliquely 

 truncate base with a rounded apex, and marked with distinct polygonal reticulations. 



Gkan Can aria — Lagoon of Mashalomas (Bolle in Herb. Braun). 



Approaches var. intermedia^ but distinguished by its very small fruit and less pro- 

 minent leaf-teeth. 



A^ar. BREViFOLiA, var. nov. 



Ramosa, internodiis spinosis elongatis, foliis brevibusangustis cum dentibus marginalibus 



magnis contiguis patentibus laminae latitudinem excedentibus, vaginis cum dentibus 



magnis singulis binisve prominentibus utrinque instructis ; fructu mediocri 



ellipsoideo. 



Leaves 1 to 1-5 cm., rarely 2 cm. long, 1 mm. m ide between the teeth, of which there 



are 4 to (J on each side, and generally 2, soraetiiues one only, on the back. Fruit obtuse 



above, rounded below% 4 to 4*5 mm. long by 2 to 2-5 mm. broad. Markings on seed-coat 



prominent, often pentagonal. 



Germany — " Schlon-See bei Heringsdorf " (" in large quantities and reaching 3 feet in 

 length") (Herb. Braun). 



It has a characteristic appearance resembling a muricate form of var. intermedia. 



Var. LATiFOLiA, A. Br. ex K. Schum. in Mart. El. Bras. iii. pt. 3, 725 (1894). 



(PI. XXXIX. fig. 11.) 

 Najas latifoJia, A. Br. iu Jourii. Bot. ii. (1861) 276. 



Planta pro genere robusta, internodiis inermibus, foliis late linearibus vel lineari- 

 lanceolatis, margine cum dentibus numerosis parvis, dorso cum linea prominula 5-7- 

 spinosa instructo, vaginis integris vel minute denticulatis. 

 Interuodes 15 to 2 cm. long, 1 to lo mm. in Avidth. Leaves 2 to 3 cm. long by 2 to 

 3 mm. broad, the margin regularly dentate, teeth 12 to 16, not exceeding -5 mm. in 

 length ; a narrow dorsal wing bears 5 to 7 larger spines. Flowers and fruit absent. 

 Tropical South America — Lagoon of Valencia, near Caracas {Golbner). 



Var. GROSSEDEXTATA, var. nov. (PI. XXXIX. iig. 16.) 



Dense ramulosa, foliis l)revibus crassiusculis iiregulariter dentatis, dentibus magnis 

 pauci> patentibus, vaginis subtruncate rotundatis a lamina bene distinctis. 

 Of a characteristic small bushy habit. Internodes 1 to 3 cm. long, gmerally unarmed 

 except for one or two spines often present just beneath the nodes. Leaves with large, 

 truncately-rounded sheaths, which ai-e entire or with a small tooth on the shoulder; 

 blade at a marked angle Avith the sheath, thick and Heshv when moistened, 7 to 10 mm. 



