374 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Spaetina cynostjboides (L. ) Roth. In the National Herbarium there is a 

 specimen of this species, consisting only of an inflorescence, labeled " Bahama 

 Islands." 



78. CHLORIS Swartz. 



Spikelets with 1 perfect floret, sessile along a slender rachis forming unilat- 

 eral spikes, these digitate ; glumes unequal ; lemma awned or mucronate ; 

 rachilla prolonged behind the palea and bearing 1 to few rudimentary awned 

 sterile lemmas. In Cuba the species are called " pata de gallina " because of 

 their digitate spikes. Those with villous florets are often included in the 

 general name " barba de indio " (Indian beard). 



Lemmas awnless ; spikes dark brown. (Eustachys.) 1. C. petraea. 



Lemmas awned ; spikes pale or purplish. 



Sterile floret narrow, the apex acute or subacute; spikelets imbricate, not 

 pectinately arranged. 

 Spikes numerous, at least 10, ascending; spikelets approximate. 



5. C. radiata. 

 Spikes. not more than 6; spikelets somewhat distant. 



Culms leafy throughout ; spikes.erect 4. C. leptantha. 



Culms naked or with few remote leaves ; spikes divergent. 

 Spikelets divergent; plant delicate; blades filiform. 



2. C. cruciata. 

 Spikelets appressed ; plant slender but wiry ; blades 1 to 2 mm. 



wide 3. C. sagraeana. 



Sterile floret broad, truncate, broadest at the summit ; spikelets pectinately 

 arranged. 

 Plants perennial ; commonly more than 1 meter tall. 



10. C. polydactyla. 

 Plants annual ; usually less than 75 cm. tall. 



Awn of fertile lemma not longer than the body ; lemma long-ciliate 



on keel and margins 9. C. ciliata. 



Awn of fertile lemma at least twice as long as the body. 

 Sterile florets 2 ; sterile lemmas nearly as broad as long. 



8. C. paraguayensis. 

 Sterile floret 1; sterile lemma narrow, more than twice as 

 long as broad. 

 Margins of fertile lemma ciliate from near the base, the 

 hairs 0.5 mm. long ; sheaths hairy in the throat. 



6. C. orthonoton. 

 Margins of fertile lemma bearing near the apex a promi- 

 nent tuft of hairs about 2 mm. long ; keel of lemma 

 ciliate to near the summit ; sheaths glabrous in the 

 throat 7. G. virgata. 



1. Chloris petraea Swartz, Prodr. \eg. Ind. Occ. 25. 17SS. 



Ac/rostis complanata Ait. Hort. Kew. 1: 96. 1789. 



Eustachys petraea Desv. Nouv. Bull. Soc. Philom. Paris 2: 189. 1810. 



Schultesia petraea Spreng. PI. Pugill. 2: 17. 1815, 



Chloris septentrionalis C. Muell. Bot. Zeit. 19: 340. 1861. 



Chloris swartzii C. Muell. Bot. Zeit. 19: 341. 1861. 



Chloris sicartziana Doell in Mart. Fl. Bras. 2V6S. 1878. 



A glabrous glaucous sparingly stoloniferous perennial, the flat culms ascend- 

 ing, the keeled sheaths often in pairs, especially in robust plants, the flat, 



