91. EEIOCAULACE^. 92. TTPHACEJE. 375 



Order XCI. EEIOCAULACE^. 



Fl. capitate, unisexual. Periantli very delicate, 2 — 6-part6d. 

 Stam. 2 — 6, if in 2 rows the inner row most developed. Anth. 

 2-celled. Ovary superior, 2 — 3-celled. Ovules solitary, pen- 

 dulous. Dehiscence of caps, loculicidal. Seeds coated with 

 wings or rows of hairs. Embryo lenticular, on the outside of 

 farinaceous albumen, at the end remote from the hile. 



1. Ehiocaulon. Fl. in a compact scaly head. Barren fl. in 

 the centre. Perianth 4 — 6-fid, the inner segments united 

 nearly to their top. Stam. 4 — 6. — Fertile fl. in the cir- 

 cumference. Perianth deeply 4-parted. Stigmas 2 — 3. 

 Caps. 2 — 3-lobed, 2 — 3-ceUed j cells 1-seeded. 



1. Eeiocatj'lon Linn. Pipewort. 



1. H. septangiildre (With.) ; scapes 6 — 8-striate exceeding 

 the cellular compressed subulate glabrous L, fl. 4-cleft hairy at 

 the end as well as the scales, stam. 4, caps. S-oel'ed — E. B. 733. 

 — Roots of many white jointed fibres. St. varying in height 

 according to the depth of the water. Fertile fl. 4-parted nearly 

 to the base ; 2 lateral divisions keeled, compressed, blunt, fringed, 

 black. Each fl. with a broad blunt black scale iu front which is 

 shorter and broader than it. — Hebrides, especially Skye. West 

 coast of Ireland, especially Connemara. P. VIll. S. I. 



Order XCtl. TTPHACE^. 



Fl. monoecious, many, closely placed in cylindrical spikes or 

 in dense globose clusters ; barren and fertile on different parts 

 of spike, the males uppermost. Perianth of 3 or more scales or 

 hairs. Stam. 1 — 6, distinct or monadelphous. Anth. erect. — 

 Fertile fl. Ovary free, solitary, 1-celled ; ovule 1, pendulous. 

 Style simple. Stigma unilateral. Fr. dry or spongy. Embryo 

 with a cleft on one side. — Eaphides abundant. 



1. Typha. Spikes long dense cylindrical, upper part male, 

 lower female. Stam. sm'rounded with hairs. Anth. 3 to- 

 gether on one filament. Ovary surrounded by hairs ulti- 

 mately stalked. 



2. Spabganium. Fl. with a single 3 — 4-leaTed perianth, 

 in distant dense globose heads, the lower bracteate. Stam. 

 free. Fruit dry, sessile. 



