4G8 CONTRIBUTIOXS FKOM THE ISATTONAL IIEEBARIUM. 



16. UNCINIA VvYS. 



Flowers unisoxual: prophylla 2, join<^<l together and ff^nning a bicarlnate utricle 

 inclosing the ovary: a sctifurni rudiment of the axis of a spikelot partly inclosed within 

 the utricle, its stout uncinate tip exserted from it. 



Species 20. mostly iuhahitiug the South Temperate Zone, in Australia, New Zea- 

 land, the more southerly islands of Oceania, temperate South Anieri<*a, but also in 

 Mexico and Jamaica. 



KEY TO THE SPECIES 



Spike dense, 3 mm. in diameter 1. U.javiaicensis. 



Spike ratlier loose, 2 mm. in diameter 2. U. tenuis. 



i 



1. Uncinia jamaicensis P(4-s- Syn. 2: b?r\. 1807. 



Carex uncutaia Sclik. Riedgr. 1: 13. j)L ^LJ. 30. 1801, not L. f. 



Distrtrution: l-'rom Tonlral America to Vrgentina. 



Costa Hican collections: Fd (\>pey, altitude 1.800 meters, Tonduz 11850; Barba 

 [riitiir]2m\\\ liarha, altitude 2.000 meters, Tonrluz 1G93. 2084; Keventado, altitude 

 2,000 meters, nttur 852; Voh^an de Poas, altitudi^ 2, GOO meters, Tonduz 10702. 



2. TJncinia tenuis Kunth^ Ethiiii. 2; 525. 1837. 



Unrinia gracilis D^^cai^ne in Ilnmbr. & Jacq. Bot. Voy. Astrolabe 2: 'pL (I. J. B. 185!^. 

 Distributiox: Chili, Patagonia, (\)sta Pica. 



Costa Rican collection: Volcan de Barba, altittuU* 2,750 meterSj Tonduz 1901. 

 The Costa Ptican luibitat is entirely nvw. 



7. CAREX L. 



Flow(u-s unisexual; prophylla 2. united into a utricle inclosing the bicarinato 

 ovarv; no rudamciit of an axis within the utricle. 



Species 1,300, distributed all over the world in the more humid n^ginus. 



KEY TO the species. 



4 



t 



Style braruln'S 2. (Vtgnea.) 



Some of the upp(T spikes pistillate at apex, staminateat base; none slaminate at 



summit and j)iptillate at l>aso- (Vignegyxae) 1. CJupta^tacJfija, 



Some of the upper spikes staminate at apex, pistillate at l)ase; 

 non(^ pistilhite at summit and staminate* at base. (Vio- 

 neandrae.) 2. C. pi chin vh en sis. 



Style brandies 3. (Eucarex.) 



Some of the upper spikes staminate at summit, pistillate at 



bas(^; none pistiPate at summit and staminate at base. (In 



the Custa Iliean species the spikes are cylindrical and 

 panieled.) (Caktcaxpuae.) 



Spikes 3 to 10 em. huig, ratlier deeply colored. 



Pistillate glumes elongateddanceolati^ hardly acute. 3. C. jumcsoni, 



Pislillate glumes aristate 4. C. piUicri. 



Spikes 1 lo 3 <'m. lont^, greeiiish-ftrruginous. 



Plant of middle siz(^; peduncles shmdir 5. C. iladostachua. 



Plant a meter high (ti more; pedundes rigid 6. C joris, 



1, Carex heptastachya Boeckl. Linnaea 39: H 1. 1875. 



Carex jonem L. II,Pailey, Mem. Torr. Club 1: IG. 1889, 



Carex durandii Hoeekl. Allgem. Pot, Zeitschr. 2: ISO. 1896. 



Rootstock short> slender; Rt(^ms densely tufted. 10 to 00 cm. hmg, slendt^r, smooth, 

 toward 1 he triangular summit minutely scabrous; leavescommonly as long as the stems. 



