526 RESTIACE.E. 



3. X. americana, Aull. Glabrous; stem low, filiform, subcyliudrieal, much longer 

 than the short leaves; leaves setaceous-filiform ; head small, ovate-oblong, 2-\-Jlowered ; 

 bracts ovate-lanceolate, pointed or bluntish, entire : dorsal area oblong-linear ; keel of the 

 lateral sepals smooth. — Aubl. t. 14.— X. carulea, Lam. Abolboda Aubletii, Kth. — Habit of 

 J. tenella, Kth. (Fl. Bras. 15. t. 28. f. 3), which is said to have broader leaves aud hispi- 

 dulous sepals. 4"-5" high ; leaves very narrow, 6"'-10"', head li'" long ; corolla "blue ;" 

 stigmas capitate ; capsule ellipsoidal, 1-celled : central funiculi numerous, the interior two- 

 thirds as long as the valves. — Hab. Trinidad !, Pel., Savannah de Aripo ; [Guiana !, Brazil !]. 



2. MAYACA, Aubl. 



Sepals 3, herbaceous. Petals 3, distinct. Stamens alternating with the petals : anthers 

 opening at the summit. Style simple. Capsule 1-celled : seeds costate, inserted along the 

 middle line of the valves. — Moss-like, creeping, or floating, leafy herbs ; leaves \-nerved, 

 spreading; peduncles axillary, \ -flowered. 



4. M. fluviatilis, Aubl. Leaves linear-acuminate or notched at the apex ; peduncles 

 spreading, half as long again or twice as long as the leaves ; petals " white;" anthers at 

 length 1-celled, corniculate at the summit, opening below it by a broad foramen ; capsule 

 8-6-seeded.— Aubl. t. 15— M. Aubletii, Schott., End/.— Branches 2"-6", leaves 3'", sepals 

 aud capsule 2"' long.— Hab. Jamaica !, AL, March ; Trinidad !, Pd., Cr., in wet places and 

 running streams of the savannahs ; [Guiana, Brazil !]. 



CXXXIV. KESTIACE^. 



Flowers glumaceous : perigone usually 2-seriate. Stamens 6-3. Ovary free, syncarpons, 

 rarely apocarpous : cells 1-ovulate : ovule pendulous, atropous. Seed of Xyridea.- — Rush- 

 like herbs : flowers clustered in the axils of bracts, often unisexual. 



1. ERIOCAULON, L. 



Inflorescence androgynous. Perigone exterior 3-2-phyllous, interior <? 3-2-lobed, ? 3-2- 

 phyllous ("rarely none"). Stamens 6-4, at the summit of the perigonial tube : anthers 2- 

 celled. Style 3-2-fid : stigma simple. Capsule loculicide. — Leaves grass-like, often pel- 

 lucid, usually rosular ; scape (or peduncle) simple, included at the base within a closed 

 sheath ; flowers in a terminal, contracted, dense umbel ; interior perigone mostly with a 

 gland at the lobes. 



1. E. caesium, Gr. (n.sp.). Stem long, submerged, leafy ; leaves hair-shaped,fiexuose, 

 \-nerved, internally partitioned, pellucid ; peduncles numerous at the summit of the stein, 

 3-4 times as long as the 3-4-dentate sheath ; heads (V" diam.) lurid-grey, densely puberu- 

 lous at the summit of the flowers ; exterior bracts roundish, glabrous ; $ flowers 6-androus, 

 ? interior perigone glabrous, glandular ; seeds ovoid-oblong, nearly smooth. — Distinguished 

 from the allied E. melanocephalum, Kth., and the East Indian E. setaceum, L., by the 

 sheath, the bracts, and the dowu of the heads. Stem 4"-6" long, floating with the peduncles 

 incurved, covered its whole length by densely approximate, 1 "-2" long leaves ; most pedun- 

 cles 3"-4" long ; head depressed-globose ; flowers much exceeding the exterior bracts, ? nu- 

 merous, as long as their pedicel, $ exterior, shortly pedicellate ; 3 exterior perigonal leaflets 

 obovate, puberulous above, 3 interior $ lobes as long as the filiform tube, unequal, oblong, 

 slightly puberulous at the glandular extremity, 3 interior $ leaflets oblong-linear. — Hab. 

 Trinidad !, Cr., in savannahs, Aripa, Omara. 



E. Humboldtii, Kth. (a large, terrestrial species), and Papalanthus fasciculatiis, Kth. 

 (3-androns), occur in Mr. Purdie's Trinidad collection : but of both Mr. Crueger doubts this 

 locality, while both are widely diffused on the continent. 



2. TONIN A, Aubl. 

 Inflorescence androgynous. Perigone exterior 3-phyllou3, interior <Jpyriform, 3-dentate, 



