46 I 



CONTRIBUTIONS FROM Mil. NATIONAL HERBARIUM 



7. Rynchospora nmcioch s lerher V.m. CentT. 56. I v 



hoffmanni Boeckl. Linnaea 37: 837 18 

 rly glabrous, moderately stoul or almost robust; panicle oi 3 corymbs, these 

 long-ped uncled, dense, and paniculate; hypogynous bristlei i to 6, rigid, little but- 

 rig iln- nui. style I reel) divided; nut ellipsoid, smooth, reticulate, 



chestnut-colored, beak conic-linear, of the length "i" the nut. 



Distribi noN Sen Grenada, Colombia, Peru, and Bolivia Costa Rica 



- \ R* w n noNa Summit <>\ theVolcande Barbs Hoffmann 65 Barba, 



altitude 2,750 meters, Tondm 1951; Los Ircengeles Valley, [scazti altitude 2,000 



111.!. ' 



B. Rynchospora vulcani Boeckl. Linnaea 37: 638. 1873. 



Boeckl Allgem Bot. Zeitschr. 2: L09. IS 

 Almost glabrous, tall; panicle of 3 or \ long-peduncled pyramidal corymbs; li j | 

 dous bristles 1 or 5, twice as long as the nut; out very small, subglobose, compn 

 Bmooth, somewhat barred transversely, brown; beak attenuate above a conical 

 shorter than the nut . 



, \ Kh w collbi noNS Summit of theVolcande Barba, Hoffmann 66; Volcan 

 . Poas, altitude 2,600 meters, Tondm L0758, L0761; Potrero del Alto, altitude 

 meters, PiUier 2 



Species related to R. maerochaeta Steud. very closely; differing slightly by its 

 \ ery small but broader nut , 



9. Rynchospora exiniia Nees Boeckl. Linnaea 37: 601. L873. 

 Spermodon eximius Nees in Seeman, Bot. Voy. Berald 222. L845 L851. 

 Ptilocarya tchiedeana Liebm. Dansk. Vid. Selsk. Skr. 2: <><». 1849. 

 Distribi n< in : Mexico, < Sosta Rica. 



• osTA Rican collbctions: Boruca, altitude 150 meters, Tondm 1479. 



10. Rynchospora robusta Boeckl. Linnaea 37: 616. 1873. 



omena robusta ECunth, Enum. 2: 283. L837. 



PsUocarya robusta Nees in Man. Fl. Bras. 2 : I hi. L842. 



Rather robust, stoloniferous, sparsely pubescent; corymbs axillary and terminal, 

 of many spikelets; mature spikelets ovoid -ellipsoid, with l to 8 nuts; bristles none; 

 style deeply bifid; nut broadly obovoid, transversely undulate-lineolate; 1 »<a k ovoid, 

 of about the length of t 1 1 « ■ nut . 



Distribution: Guatemala, Costa Rica, South America. 



\ I'n w collection: Cie*naga de Agua Buena, altitude 1,100 meters, PiUier 

 1 L023. 

 11 Rynchospora longispicata Boeckl. Linnaea 37: < ; <><>. I v 7'. 



Rynchospora Uliformis Griseb. Fl. Brit. West ln«l. 576. 1864, not Vahl. I - 



Dichromena jUiformis Kunili. Knum. 2: 281. L837, Bynonyms excluded. 



Spermodon filiformis Nees in Mart. Fl. Bras. 2 1 : L18. 1843. 



Distribution: Widely dispersed through tropical America. 



I osTA Bi< vn collections: Buenos .\ir<->. altitude 300 meters. Pxlticr 10 

 12. Rynchospora clarkei Rose, Bp. now" 



Stems L to 8 cm. l"ii<_ r . monocephalous, the head composed of L or 2 spikelets; leaves 

 I to3 cm. l"ii<_ r . linear; spikelets 2 to 3 mm. l"iiL r . maturing I to l nuts; hypogynoui 

 bristles none; Btyle branches li. linear, rather long; nut 0.5 mm. long, obovoid, slightly 

 turgid, smooth, grayish-green; beak depressed. 



Type, sheet no. 818779, \ . S. National Berbarium. 



Distribution: Mexico (Jalisco, Eringle 2319, type , Costa Rica. 

 :\ Rican collection: Buenos Aires, altitude 200 meters, PiUv 



ie species was given a name by Mr. Clarke, which is found to bea homonym. 

 I have accordingly taken the liberty to name it for Mr. Clarke himself. -J. N. I 



