408 r>E. A. B. EEXDLE — SYSTEMATIC 



about 10 teetli on its sloping shoulders ; blade tapering gradually upward or near the 

 top only ; the stiff brown ascending spines, about 35, are slightly raised above the margin? 

 which is strengthened with several hypodermal rows of elongated narrow cells. Intra- 

 vaginal scales 1 mm. long. 



The brown spots which give the leaves their characteristic punctate appearance are 

 due to the presence of scattered tannin-spcs. 



Male flowers 3 mm. long, borne on a short pedicel; female flowers 2 mm. 



South America — Caracas, Udora Valencia {Gollmer), 



11. Najas microcarpa, K. Schum. in Mart. Fl. Bras, iii. pt. 3, 727 (1894). 



*' Caulibus exemplarium exstantium apicem tantum referentium internodiis valde abbrevi- 

 " atis, ita ut habitus conf ertus evadat, ramosissimis, rhombeo-dichotomis ; foliis paten- 

 " tibus subflexilibus, baud curvatis, anguste linearibus acuminatis, cellulis scleroticis 

 " marginalibus et dorsalibus 0, jam oculo nudo manifeste serratis, serraturis subre- 

 " pandis 7-10 utraque laminse parte, cellulis pluribus ultra marginem laminae elevatis ; 

 " vagina declivi serraturis 3-5 utroque latere interdum tali modo ultra marginem 

 " elevatis ut vagina subciliata evadat ; flore femineo lageniformi, apice in ramos 

 " stigmatiferos binos, insuper in aculeiferos solitarios vel binos, rarius ternos, desi- 



" nente ; flore masculino ; semine ellipsoideo utrinque obtuso in genere minimo, 



" seriebus arearum majuscularum exsculpto, cellulis epidermidis in parietibus 

 " lateralibus gracillime systemate duplici linearum reticulatis." 

 Specimens only 2 to 3 cm. long, with internodes not exceeding 5 mm. long and about 

 •3 mm. wide. Leaves reaching 1 to 1"2 cm. long, and, including the teeth, scarcely "5 mm. 

 broad, dull blackish green or black. Sheaths v^a^ahm^ 1 to 1-2 mm. long, and 1'2 to 1'5 

 mm. broad ; intravaginal scales scarcely exceeding -5 mm. Female flowers generally 

 closely croAvded in threes in the leaf -axils (as in ]S\ graminea), 1*5 mm. long, style scarcely 

 half thf» length. Seed yellow, less than 1 mm. long and half as thick, with about 10 rows 

 of proportionately large pits, scarcely more than 8 in a row. 

 VA^AGVAY—{JFed(lell, nos. 2374, in part, and 3289). 



Plant not seen. The description is copied from Schumann (/. c), who says that the 

 sj)ecivi^ comes -near N^microdoii and ]V. coiiferta in the structure of the seed-coat, but 

 differs from them and all others known in its very small, broadly ellipsoidal seeds, twice 

 as long as broad. The very narrow leaves and more or less ciliated sheath also afford 

 distinctive characters. 



12. Najas Weightiana, A. Br. (PL XL. figs. 68-74.) 



A'. Wrightiana, A. Br. in Sitziingsb. Ges. Naturf. Fr. Berlin, 1868, 17 ; K. Schum. in Mart. Fl. Bras, 

 iii. pt. 3, t. 123. fig. 1 (sub A^ confefrta). 



N_.flexins, Griseb. Cat. PI. Cub. 218 (186G), non Rostk.; A. Br. /. c. 



Erecta, caule interdum quoque ramis primariis validis, ramis vel ramulis brevibus dense 

 foliatis ; foliis tenuibus anguste linearibus obtusis vel subacutis, patentibus, leviter 

 recurvatis, margine denticulate, denticulis patentibus a spinulis ascendentibus termi- 

 natis ; vaginis cum dentibus paucis protiiinulis instructis ; squamulis intravaginalibus 

 brevibus anguste lineari-lanceolatis, sublanceolatis, vel oblongis, et sub apice angus- 



