1958] 



THE BOTANY OF THE QUAY AX A HIGHLAND PART III 



43 



cana Savanna No. 1, at 120 m alt., March 17, 1953, Maguire 4' Wurdack 34511; frequent, edge 

 of Yapacana Savanna III, March 17, 1953, Maguire 4" Wurdach 34536 ; Yapacana Savanna II, 

 at 125. m alt., Nov 20, 1953, Maguire, Wurdack $ Bunting 36625B. Brazil. Uacafia, Rio Icana, 

 Amazonas, April 4, 1952, Froes 28182 (NY). 



3. Duckea junciformis Maguire, sp. now Figure 7. 



Herbae perennes Yalde glaucae, eaudiee simplici brevi ; foliis paucis, laminis 

 40-60 cm longis, teretibus, sursum plano-compressis, 1.5-2.5 mm latis, minute 

 punctatis, obtusis ; vaginis 10-15 em longis, pallidis, saepe ex laminis; seapis 

 pluribus teretibus, saepe tumidis, 50-80 em longis, 2-4 mm diam. ; inflorescentia 

 globosa, multispicata, 14-18 mm diam., bibraeteata ; braeteis lineari-lanceolatis, 

 2-4 em longis, 1.5-2.0 mm latis, acutiuseulis, demum reflexis; spieis laneeolato- 

 fusiformibus, 9-11 mm longis ; braeteolis 25-30, gradatis, 3-6 mm longis, OYatis 

 vel sursum laneeolatis. aeutis, exterioribus rufis, 1-nervatis, interioribus pallidis, 

 5-7-nerYatis ; sepalis 3, laneeolatis, 7-8 mm longis, ad basim scariosis, connatis, 

 sursum aliquantum induratis; petalis :!. luteis. inclusis, ca. 5 mm longis, laminis 

 oblongo-OYatis, apiculatis, ca. 2.5 mm Longis, minute maculatis, unguibus ad basim 

 connatis, ea. 2.5 mm longis; staminibus 6; filamentis seariosis, planis, ca. 3 mm 

 longis, ad basim tubo corollae adnatis; antheris 4-thecatis, laneeolatis. ca. 3 mm 

 longis, poro solitario oblique dehiscentibus ; stylo subulato, stigmate apicali trun- 

 cato plus minusve concavo; ovario 3-loculari, 3-ovulato, ovulis basifixis; eapsula 

 oblonga, ca. 3 mm longa, ad apicem depressa ; seminibus oblongis. 2.0-2.3 mm 

 longis, aliquantum 3-angulatis, minute apiculatis, testa hyalina in longitudine 

 striata. 



Type: perennial herb with yellow flowers, herbage glaucous, scapes becoming 

 somewhat tumid, frequent, marshy area, sabanita 1 km cast of Maroa, at 130 

 m alt., Rio Guainia, Terr. Amazonas. Venezuela. April 16, 1953, Maguirt & Wur- 

 dack 35697 (holotype NY). Paratype: Abundant, sabanita 1 km east Maroa, 

 type locality. Nov 25. Ma<jnir< . Wurdack & Biniii)i</ 36417. 



Known only from the vicinity of Maroa, but there abundant. 



Specimens examined : VENEZUELA: Ten. Amazonas: Maguire 4" Wurdack 35697 (holo- 

 type NY) ; Nov 25, 1953, Maguire, Wurdack # Bunting 36417. COLOMBIA: Yaupes. Puerto 

 Colombia, opposite Maroa, Kio Guainia, Oct 31-Nov 2, 1952, Schultes, Baler 4- Cabrera 1S167 

 (NY). 



4. Duckea flava (Link) Maguire, comb. nov. 



Schoenus flaws Link, Jahrb. 3: 75. 1820. 



Bapatea? flava (Link) Kunth, Enum. PI. 3: 307. 1841. 



Monotrema flavum (Link) Kornicke, Linnaea 37: 478. 1874. 



Type: Maipure, Venezuela. Humboldt 1094 (B). 



Specimens examined: BRAZIL: fiores pallide flavi, super cataraetas ad ripas arenosis, 

 Rio Curicurary (affl. Rio Negro), Amazonas, Nov 23, 1930, A. BucTce 35593 (RB, P, S, G, NY, 

 US.) VENEZUELA: Temi, Yavita, Amazonas, alt. 128 m, Jan 30, 1942, L. Williams 14087 

 (F, US, YEN) ; Maipure, Humboldt 4' Bonpland 1094 (holotype B) ; locally common, perennial 

 herb 3-4 m high, in thickets of recently flooded small bamboo and palm, on white sand,. Rio 

 Temi, Rio Atabapo, % hour below Yavita, Oct 19, 1950, Maguire 29321; occasional, flowers 

 yellow, at length whitish, thickets, caatinga, Savanna III at base of Cerro Yapacana, 175 m alt., 

 Dec 31, 1951, Maguire, Cowan 4' Wurdack 30487 ; Yapacana Savanna I, Jan 7, 1951, Maguire, 

 Cowan 4" Wurdack 30800; flowers yellow, thickets, lagoona, Cano Yapacana, occasional, 125 m 

 alt., March 10, 1953, Maguire $ Wurdack 34492; Cano Pimichm, at 125-135 m alt., April 14, 

 1953, Maguire 4' Wurdack 35630 ; clumped perennial herb near water's dege, occasional, edge of 

 laja, 50 km above mouth of Rio Pacimoni, at 120 m alt., Nov 27, 1953, Maguire, Wurdack 4' 

 Bunting 36643 ; flowers yellow, frequent, savannas on right bank of Rio Pacimoni, 50 km above 

 mouth at 120 m alt., Feb 7, 1954, Maguire, Wurdack 4' Bunting 37598 ; flowers yellow, locally 



