DYCKIA. 187^ 



foot long, with numerous dense spicate peduncled branches, the 

 lowest 6-8 in. long; flower-bracts ovate, as long as the calyx.; 

 Sepals oblong, obtuse, ^ in. long. Petals lingulate, unguiculate, - 

 more than twice as long as the sepals. Stamens as long .as the 

 petals. Style ^ in. long, distinctly trifurcate. 

 Hab. South Brazil, Sello 3339 ! (Herb. Eeg. BeroL). 



30. D. MACRACANTHA Bakcr. — Leaves rigid, ensiform, a foot long, 

 IJ in. broad above the dilated base, narrowed gradually to the tip, 

 green and glabrous above, thinly lepidote beneath. Peduncle" 

 2-3 ft. long; bract-leaves long and rigid. Panicle 1^ ft. long; 

 branches laxly spicate, the lower 3-5-farcate ; flower-bracts very 

 small, ovate. Sepals oblong, obtuse, | in. long. Petals lingulate, 

 yellow, J in. long. Style as long as the ovary. 



Hab. South Brazil, Sello 75 ! (Herb. Paris). 



31. D. MYRiosTACHYA Baker. — Leaves not seen. Peduncle 

 ^-| in. diam. ; bract-leaves rigid, ensiform, elongated, spine- 

 margined. Inflorescence a panicle above 2 ft. long, with a stout 

 rachis and 50 or more densely spicate peduncled branches, the. 

 lower 4-5 in. long, not more than ^ in. diam., flowers included ; 

 flower-bracts very small, ovate. Sepals less than half- as long as 

 the petals, which are lingulate, ^ in. long. Stamens and style 

 elongated. 



Hab. South Brazil, Sello 76 ! (Herb. Paris). Habit of Hechtia stenopetala. 



Subgenus 3. Navia. 



32. D. CAULESCENS Baker. Navia cauJescens Mart. ; Schult. fil. 

 Syst. Veg. vii. 1195. — Caudex simple or forked, the thickness of a 

 man's finger, 3-8 in. long. Leaves densely rosulate, lanceolate or 

 linear-lanceolate, 2-3|- in. long, J— | in. broad; marginal teeth 

 small, crowded, patent. Peduncle |-1 ft. long; bract-leaves 

 lanceolate, adpressed, the lower serrated. Inflorescence a short 

 panicle, with a pubescent axis and several dense sessile ovoid 

 strobiliform spikes J-|- in. long ; flower-bracts ovate, acute, ^ in. 

 long, at first floccose. Sepals ovate acute, ^ in. long, the two outer 

 acutely keeled. Petals white, above ^ in. broad ; blade lanceolate. 

 Stamens as long as the petals ; filaments filiform. Capsule ^ in. 

 long, ovoid, obtuse, cuspidate. 



Var. MINOR Mart. loc. cit. — Leaves linear-lanceolate. Peduncle 

 3-6 in. long, sometimes procumbent. Spikes few, 3-12-flowered, 

 1-1 in. long. 



Hab. Amazon Valley; banks of the Yapura, on hills at Araracoara, 

 Martins. 



Subgenus 4. Cephalonavia. 



33. D. acaulis Baker. Navia acaulis Mart. ; Schult. fil. Syst. 

 Veg. vii. 1196. — Caudex none or very short. Leaves linear- 

 lanceolate, 2|-5 in. long, i-i in. broad, glabrous on both surfaces; 

 marginal spines small, crowded, spreading. Flowers in a dense 

 ovoid capitulum ^-| in. diam., sessile in the centre of the rosette 



