MANN, FLORA OF THE HAWAIIAN ISLANDS. 113 



VI. Flora of the Hawaiian Islands. 

 BY HORACE MANN. 



[Communicated Nov. 5, 1866.] 



SERIES I. 

 PHJENOGAMOUS OR FLOWERING PLANTS. 



Vegetables bearing proper flowers, that is, having stamens and 

 pistils, and producing seeds, which contain an embryo. 



CLASS I. 

 DICOTYLEDONOUS OR EXOGENOUS PLANTS. 



Stems formed of bark, wood, and pith ; the wood forming a layer 

 between the other two, increasing, when the stem continues from year 

 to year, by the annual addition of a new layer to the outside, next the 

 bark. Leaves netted-veined. Embryo with a pair of opposite cotyle- 

 dons^ or rarely several in a whorl. Flowers haying their parts usually 

 in fives or fours. 



DIVISION I. 



POLYPETALOUS EXOGENOUS PLANTS. 

 Floral envelopes double, that is, consisting of both calyx and 

 corolla; the petals not united with each other.* 



ORDER I. RANUNCULACE.E. 



Herbs with a colorless acrid juice ; the sepals, petals, stamens and 

 pistils all free (hypogynous) and separate, the two latter usually indefi- 

 nitely numerous ; the seeds with a minute embryo at the base of fleshy 

 albumen : abounding -only in cool regions ; represented in gardens by 

 Larkspurs, Aconites, Anemone, &c., but on these islands only by the 

 genus after which the order is named. 



1. RANUNCULUS Linn. [Makou.] 



Sepals 5. Petals 5, flat, with a little pit or scale at the base inside. 

 Achenia numerous, in a head, mostly flattened, pointed ; the seed erect. 



* In many exceptional cases, some species or some genera belonging to polypetalous 

 orders are destitute of petals. 



COMMUNICATIONS ESSEX INST. VOL- V. 16 NOV. 30, 1866. 



