58 



ORCB.IDACEM 



The leaves in the specimens collected by Williams appear to 

 have had a whitish mid-line when fresh. The bracts are trans- 

 lucent and purplish in dried specimens. The dilated portion of 

 the lip resembles the tail of a whale ; the fleshy appendages at the 

 base of the sac are rugose in the dried state. 



A. (§ Monochilus) MARIVELENSIS sp. nov. Herba 12-20 

 cm. alta vel major, gracilis. Folia circa 4, omnia infra medium 



caulem inserta, ovato-lanceo- 

 lata, acuta, 3 cm. longa, 1.5 

 cm. lata. Petiolus inflatus, 

 ad basim vaginans. Bractece 

 3—4, acuta?, magis minusve 

 divaricatae, vaginantes, 2-3 

 cm. distantes. Flores 3-6, in 

 racemo laxo dispositi, albi. 

 Bractece inflorescentice line- 

 ari-lanceolatae, caudatae, acu- 

 minatae, acutae, ovariis longio- 

 res, 7-12 mm. longae. Sepala 

 later alia lanceolata, subacuta, 

 6 mm. longa. Sepalum dor- 

 sale ovatum, obtusum, ad 

 basim valde concavum, petalis 

 adhaerens, 6 mm. longum. Pe- 

 tal a oblonga, obtusa, 7 mm. longa, 3 mm. lata, ad basim angustata. 

 Laoellum 10-11 mm. longum, 4 mm. a basi in lobos 2 magnos 

 divergentes divisum ; lobi spathulati vel oblanceolati, ad apicem 

 rotundati, 6 mm. longi, 4 mm. lati ; basis labelli saccum non 

 altum formans, intus utroque processu unciformi. 



A. marivelensis is allied to Zeuxine regia Benth., from which 

 it is distinguished by the very different petals and lip. 



Lamao River, Mt. Mariveles, Prov. Bataan, Luzon, March, 1905, 

 E. D. Merrill (no. 3963). — February 16, 1905, H. N. Whitford 

 (no. 1095). 



AdE>~OSTYLIS MARIVELENSIS 



