369 



mainly in tlie linear, entire, minutely denticulate leaves, which give the plant an 

 entirely different appearance from that of Rollandia longiflora. 



The specimen collected by Dr. H. L. Lyon, no. 8816, has the longest t^.owers 

 of any h'oUandia observed; they measure over nine cm including the calyx tube. 



Rollandia purpurellifolia Rock in Coll. Hawaii Publ. Bull. 2:44. 1913. 



(Plate 207.) 

 Plant 3-5 dm high with fleshy stem, unbranehed, unarmed and glabrous ; 

 leaves subsessile or on petioles of 5-8 mm. linear-oblong, shortly acute at the apex, 

 decuri-ent at the base into a somewhat margined petiole, dull deep green above or 

 grayish green when cUy, deep purple and shining underneath, glabrous above, 

 but slightly liirtellous on the nerves but not midrib underneath, 16-35 em long, 

 3.5-6.5 cm wide, the margin minutely denticulate, but entire in the lower fourth 

 or third ; inflorescence glabrous ; peduncles slender, with few knobby scars, 15-25 

 mm long, bracteate at the apex ; pedicels slender blackish purple, 12-20 mm long 

 bibracteolate below the middle; tlowers unknown; fruits dark purple to black, 

 obovoid, 15-18 nun long, crowned by the 4-6 nmi long, acute calycine lolies. 



OAHU: Dense forests of i'uualuu Mountains and on the suunnit ridge above 

 Hauula in dense shade with Lysimacltia Forbesii Rock, fruiting AugiLst 1911, 

 Rock, type no. 8824 in the herbarium of the College of Hawaii. 



No flowering specimens of this species have been secured so far and therefore 

 the generic position of this species cannot positively be determined; the outward 

 aspect, the leaves and fruits are, however, unmistakably those of a KvUandia. 



The plant is close to Rollandia longiflora AVawra. 



Rollandia longiflora W'awra in Mora od. Alli;em. Dot. Zeit. XXXI ;44. 1873. 

 Rollandia sanyuinca Hilleljr. in herbar. 



(Plate 208.) 

 Stem smooth 1.3-3.3 m tall, leaves lanceolate 3(1-40 cm lung, 6-S cm wide, 

 acute, gradually narrowing into a short petiole of 2.5 cm, entire or denticulate, 

 sinuate particularly near the base, even faintly laciniate, glabrous on both sides, 

 shining, thin chartaceous; raceme slender ca 3 cm bracteate from the base. 5-10- • 

 flowered, pedicels 10-15 mm, bracts 2-3 mm. bractlets dentiform or wart-like; 

 calyx five-toothed ; corolla dark red sigmoid 6-6.5 cm, gradually widening from 

 a slender base to a width of 1 cm with a deep dorsal groove; staminal column 

 adherent up to the middle of the corolla, dark red, glabrous, the upper anthers 

 not tufted; berry pyriform 1 cm or little more. The young plant is prickly or 

 muricate and has the leaves unevenly lobed or laciniate. 



OAHU: Western division of the main ridge, from Waipio to Helemano, 

 IIilI('l)raii(l in Herbarium I5ei-liii, the herl)arium of the Hislinp Museum, Hono- 

 lulu, and the Gray Herbarium ; — Wawra no. 2285, ex herljarium Ilillebrand in 

 Herbariiun Vienna ; — Scliofield Barracks, east range, July 11, 1916, A. S. Hitch- 

 cock no. 141133 in the U. S. National Herbarium, "Washington, D. C. ; — right-hand 

 branch of ^lakalcha Valley, at an elevation of 1000 feet, on steep forested .slopes, 

 flowering ilay 3, 1918, Rock no. 13110 in herbarium of the College of Hawaii. 



This species is easily distinguished b.v the calyx, which is only sinuately five- 

 toothed instead of lobed as in the other species of the genus. The species grows 

 much taller than was recorded by Ilillebrand; the writer met with plants ten 

 feet in height. The flowering season is in the early sprinu-, April to May. 



