NIGRITELLA 
496 
Nigritella Rich. = Habenaria Willd. [See Alpenblumen , p. 66.] 
Nipa Thunb. Palmae (v). 1 sp., N. fruticans Thunb., trop. Old 
World, a low-growing palm with monoecious infl. Fruits woody, 
combined into a dense head ; each contains one seed. It grows 
in brackish water and is a very characteristic plant upon large areas 
of the trop. coasts (p. 191). [See Phytelephas.] 
Nivenia Vent. = Aristea Soland. 
Nolana Linn. Nolanaceae. 20 sp. Chili, Peru. Many are shore 
plants (p. 169) with fleshy leaves. The length of the sta. and style 
varies considerably in different firs, (see Darwin’s Forms of Firs . 
p. 261). 
Nolanaceae. Dicotyledons (Sympet. Tubiflorae). 3 gen. with 30 sp., 
W. coast of S. Am. Herbs or low shrubs with simple leaves, often 
covered with glandular hairs. The leaves in the vegetative region are 
alt., but in the infl. portion they become paired in the same way as in 
Solanaceae (q.v.). Many of the order are sea-shore plants with 
fleshy leaves (p. 169). Firs, solitary in the leaf-axils, regular. 
K (5); C (5); A 5, alt. with petals. Cpls. typically 5, only united in 
Alona, usually free and divided by irregular longitudinal constrictions 
into 5 or 10 portions standing in a row, or by longitudinal and trans- 
verse constrictions into 10 — 30 portions in 2 or 3 rows. The fruit 
consists of a corresponding number of 1 — 7-seeded nutlets. Stipe 1. 
Seed albuminous. Genera : Nolana, Alona, Dolia. United to Con- 
volvulaceae by Benth-Hooker ; placed in Personatae by Warming. 
Nolina Michx. Liliaceae (vi). 10 sp. South-west of N. Am. Xero- 
phytes with the habit of Dasylirion. 
Nonnea Medic. Boraginaceae (iv. 3). 30 sp. Medit. 
Nopalea Salm-Dyck. Cactaceae (11). 3 sp. Cent. Am. Very similar 
to Opuntia. N. coccinellifera Salm-Dyck is the plant upon which the 
cochineal insect ( Coccus cacti ) is cultivated, chiefly in the Canaries &c. 
It has no thorns. 
Norantea Aubl. Marcgraviaceae. 14 sp. trop. Amer. All the firs, 
are fertile, and have saccate nectariferous bracts. The plant re- 
sembles Philodendron in habit. Placed in Ternstroemiaceae by 
Benth.-Hooker. 
Nothochlaena R. Br. Polypodiaceae. 30 sp. trop. and temp. 
Nothofagns Blume = Fagus Toum. 
Nothopanax Miq. = Panax Linn. 
Nothoscordum Kunth. Liliaceae (iv). 10 sp. China, Am. Adventi- 
tious embryos are formed by budding of the nucellus tissue round the 
embryo-sac (cf. Funkia). 
Nuculiferae (Warming). The 6th cohort of Sympetalae (p. 138). 
Nudiflorae (Benth-Hooker). The 5th series of Monocotyledons (p. 
137)- 
Nuphar Sibth. et Sm. Nymphaeaceae (in). 7. sp. N. Hemisph. AT. 
luteum Sibth. et Sm. is the common yellow water-lily or brandy- 
