BLAKE—REVISION OF FLOURENSIA. 407 
Flourensia thurifera y lanceolata Remy; Gay, Fl. Chil. 4: 288. 1849. 
Helianthus besseriana Benth. & Hook.; Hook. & Jacks. Ind. Kew. 17: 1112. 1893, as 
synonym. 
Erect resinous shrub, 2 meters high, the branches striate, greenish brown or yellowish 
brown, the young branchlets purplish brown, sparsely pubescent; leaf blades 5.5 
to 10 cm. long, 1.5 to 3.5 cm. wide, elliptic or ovate to oblong-elliptic, subacuminate 
to obtuse at apex, mucronate, cuneate at base, shallowly repand-dentate with 4 to 7 
pairs of coarse depressed-triangular mucronate teeth or rarely subentire, thickish, 
resinous, with a few loose hairs on midvein beneath, prominulous-reticulate with 7 
to 12 pairs of conspicuous lateral veins; petioles 2 to 5 mm. long; upper leaves reduced 
and often entire; heads 3.5 to 7 cm. wide, 2 to 6 at ends of branches on naked or linear- 
bracted, terminal and axillary, 1-headed peduncles 3 to 13 cm. long; disk 10 to 14 
mm. high, 1.4 to (fruit) 2.5 cm. wide; involucre 2 or 3-seriate, subequal or with the 
outer phyllaries shorter, 1 to 2 cm. high, the phyllaries oblong-lanceolate or lanceolate 
to oblong-spatulate, acute, loose, herbaceous, thickish, slightly ciliate; rays about 12, 
oval to oval-oblong, golden-yellow, barely emarginate, glabrous, 1.4 to 2.6 cm. long, 
5 to 10 mm. wide; disk corollas 5.5 mm. long (tube 1 mm.), the throat slender-funnel- 
form; pales widened upwardly, scarious-margined, obtuse, often mucronate, blackish 
green at apex, 9 to 10 mm. long; achenes oblong-obovate, thickened, villous, 6.5 to 
7.5 mm. long, 3 to 3.6 mm. wide; awns 2, stoutish, ciliate, somewhat flattened, 3 to 
3.5 mm. long, one or both often split nearly or quite to base, forming 1 or 2 lateral 
squamelloid awns. 
Type Locautry: Vicinity of Valparaiso, Chile. 
InLustRATION: Mem. Accad. Sci. Torino 38: pl. 31. 
SPECIMENS EXAMINED: 
Cute: Coquimbo, Gaudichaud 84 (G). Valparaiso or vicinity, 1825, Macrae 
(K); in 1830, Bertero 954 (B); in 1830, Bridges (B, G, K); in 1831, Cuming 
631 (B, K); in 1832, Bridges 234 (B, K); in 1856, Harvey (G, K); in 1882, 
Philippi & Borchers (B); in 1914, Rose 19113 (N); Gaudichaud 153 (G); Wilkes 
Exploring Expedition (G, N); Moseley (B); Reed (B). Santiago, 1855, Ger- 
main (B, K); Philippi 592 (B), 560 (Ber.). San Cristébal, near Santiago, 
1900, Hastings 137 (N). Las Esmeraldas, Department Melipilla, October, 
1867, Reed (K). Common on hills about Llaillai, 1904, Scott Elliot 357 (B). 
Commonest shrub of foothills, Los Andes, 1904, Scott Elliot 415 (B). With- 
out definite locality, Besser (type of F. besseriana; Ber., photo. and fragm. | 
G); Cruikshanks 155 (K); Gay (G, K). 
Flourensia thurifera, the commonest South American species in herbaria, is usually 
readily recognized by its large, elliptic to oblong-elliptic, coarsely but shallowly 
dentate leaves and large involucre of oblong-lanceolate to oblong-spatulate phyllaries. 
Although Molina’s original account 1? of the species is very short, and his description 
of the leaves decidedly unsatisfactory, his general account of the plant and its habitat 
is sufficient to justify the retention of the name in the sense in which it has been 
used by all subsequent authors. The species bears the vernacular name ‘‘mara- 
villa,’’ like others of the genus, and its resin is used for incense in the churches. 
22. Flourensia angustifolia (DC.) Blake. 
Flourensia thurifera B angustifolia DC. Prodr. 5: 592. 1836. 
Glutinous branching shrub, 0.5 meter high; younger branches and peduncles some- 
what sordid-puberulous; leaf blades 3.5 to 7.2 cm. long, 7 to 13 mm. wide, narrowly 
12 “Nelle colline adjacenti al porto de Valparaiso si trova una specie di Girasole 
Helianthus thurifer(*) di consistenza legnosa, dal quale scola ancora una sostonza 
resinosa, che simiglia per la forma, e per l’odora al vero incenso.’’ (Molina, loc. cit. 
in text.) ‘‘(*)Helianthus caule fruticoso, foliis lineari-lanceolatis.’’ (Footnote, loc. 
cit.) 
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