1953] 



BOTANY OF THE GUAYANA HIGHLAND 



125 



3. Mature sepals ovate-cordate, margins ciliolate; bractlets 4-angled, 

 densely red-hirsute; leaves coriaceous, oblong-elliptic 4-6 cm. 

 long, 1-2 cm. broad, stipules not connate. 3. Sipapoa ferruginea. 



2. Leaves densely pubescent on upper surface, as are leaf-sheaths, stip- 

 ules and sepals; stipules not connate. 4. Sipapoa vestita. 

 1. Inflorescence glabrous, glaucous; stipules large, foliar exceeding 2 cm. 



long; mature sepal lanceolate, entire. 5. Sipapoa stipularis. 



1. Sipapoa kunhardtii Maguire, sp. nov. 



Frutex vel arbor parva 2-5 m. alta; ramulis 3-4 mm. diam. in sicco sulca- 

 tulis sparse patenter rufo-hirsutulis mox glabratis, internodiis 1-2 cm. longis; 

 foliis oppositis, laminis ellipticis vel suborbicularibus (3.5) 5-7 cm. longis (2) 

 3-5 cm. latis chartaceis cum 5 jugis nervis lateralibus, supra glabris margini- 

 bus exceptis, nervis prominulis impressis, subtus flavi-albidis glaucis glabris 

 marginibus nervisque exceptis, marginibus conspicue hirsuto-ciliatis, nervis 

 sparse sed conspicue hirsuto-pilosis, apice obtuso vel brevissimo-cuspidato, 

 basi obtusa, petiolo ad basim in vaginam 12-18 mm. connato hirsutulo vel glabre- 

 scenti granulari-glauco intus dense adpresso-hirsuto parte libera 5-7 mm. longa, 

 stipulis intrapetiolaribus lanceolatis acutis 10-12 cm. longis, lateraliter connatis 

 3-4 mm.; inflorescentia pleniflora terminali racemosa (7) 10-14 cm. longa rufo- 

 fulvo-hirsuta; bracteis inferioribus unijugis ad basim in tubo ca. 1 cm. connatis, 

 parte libera subfoliacea 1-2 cm. longa lanceolata vel oblanceolata acuta vel ob- 

 tusa, bracteis superioribus 4-6 mm. longis ellipticis vel lanceolatis obtusis con- 

 spicue rufo-hirsuto-pilosis glaucis; bracteolis 2-3 mm. longis ovatis subacutis 

 submembranaceis rufo-hirsutulis caducis; pedicellis 3-8 mm. longis hirsutulis; 

 floribus ca. 8 mm. diam. flavis, sepalis ca. 3-4 mm. longis lanceolatis glandulari- 

 denticulatis glabris vel sparse hirsutulis flavi-rubescentibus squarrosis bi- 

 glandularibus, maturis 10-12 mm. longis 3-4 mm. latis oblongo-lanceolatis denti- 

 culatis membranaceo-chartaceis foliaceis rubrovenosis plusminusve conniventi- 

 bus; petalis flavis 4-6 mm. longis, unguibus 2-3 mm. longis ca. 0.75 mm. latis, 

 laminis ovatis 3-4 mm. longis cordatis flavis; staminibus 8, filamentis subae- 

 qualibus liberis ca. 2.5 mm. longis 0.75 mm. crassis subteretibus rubris glabris 

 ad basim intus subpilosis; antheris oblongis glabris subaequalibus tribus 1.0 mm. 

 longis, quinquibus 1.2 mm. longis, theca albida ad apicem 2-aristata, aristis ca. 

 0.5 mm. longis spinulosis nigrescentibus introrse nectantibus vel adscendentibus; 

 toro piano glabro; ovario glabro 2-loculare 1-2-ovulato, stylis 3 subulatis 2-3 mm. 

 longis subacutis; fructibus indehiscentibus ovoideis ca. 2.5 mm. longis sub- 

 verrucosis, pericarpio indurate; seminibus ca. 2 mm. longis lenticulari-obovatis, 

 testa membranacea, cotyledonibus subaequalibus carnosis, interiore inflexo- 

 conduplicato exteriore cucullato-concavo-orbiculari semi-incluso. 



TYPE: shrub or small tree to 4 m. high, flowers yellow, expanded sepals 

 bright red, frequent in open savanna, Cano Negro, 1500 m. alt., December 15, 

 1948, Cerro Sipapo, Terr. Amazonas, Venezuela, Bassett Maguire & Louis Politi 

 27677; New York Botanical Garden. Paratypes, Cerro Sipapo, Maguire & Politi: 

 small tree 4 m. high, low woodland below Lower Camp Savanna, 27672; small 

 tree 3-4 m. high, flowers yellow, frequent, Lower Cano Negro, 28104. 



Sipapoa kunhardtii is a frequent shrub of the Carlo Negro savannas where it 

 is conspicuous because of its attractive yellow spikes and brilliant red ampliate 

 fruiting calyces. It appears to be the sole species of the genus on Sipapo, and 

 was collected only in the Cano Negro drainage. 



2. Sipapoa hypoleuca iViaguire, sp. nov. 



Frutex; ramulis obscure quadrangularibus glabris glaucis, internodiis 8-20 

 mm. longis; foliis oppositis, laminis ellipticis vel oblongo-ellipticis 4-8 (11) 

 cm. longis 1.8-4.0 (6.5) cm. latis, supra glabris, subtus dense albo-subfulvis 



