Monographs Details: Henriquezia verticillata Spruce ex Benth. var. verticillata
Authority: Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. Rio Negro, state of Amazonas, Brazil, and Rio Guainia and Territorio Federal Amazonas, Venezuela. VENEZUELA. Amazonas: along the Guainia, above the confluence of the Casiquiare; tree 40-60 ft. high; leaves constantly 4 together; June, 1854, Spruce s. n. (photo NY); along Rio Guainia near Maroa; occasional; large riverine tree; leaves (4-)5-whorled; corolla white, each lobe with central pink line, the throat and tube within orange-speckled, one lobe with yellow markings; alt. 120-140 m, 27 Nov 1953, B. Maguire, J. Wurdack, & G. Bunting 36432 (NY). BRAZIL. Edo. Amazonas: secus Rio Negro, inter Barcellos et San Isabel (Rio Negro, gapo, frequent from above Barraroa to Sao Gabriel) ; tree 80-100 ft by 4 ft; flowers odoriferous, pink without, white within with a streak of yellow pubescence in front; Dec 1851, Spruce 1957 (photo NY, isotype NY); Cucui, Rio Negro; arvore, 25 metros, 50 cm; belo ornamento, flores em profusao; 14 Dec 1945, Froes 21518 (NY, US); Rio Negro, Preto, Maboaby; border of river near to caatinga; tree 40 ft; high land, high forest; flowers rosy, white red strip; 17 Nov 1947, Froes 22872 (NY, US); same locality, 8 Nov 1947, Froes 22784 (NY); Manaos, ad ripas paludosas rivuli, Mindu superioris; arbor magna; flores albi, tubo intus striis purpureis et linea lutea pilosa ornato; 22 Oct 1929, Ducke 22813 (NY, US); Manaos, igapo do Igarape Mindu no curso superior; arvore grande; corola branca comdesenhos roseos e, do lado interior con sinal amarelo; 12 Nov 1942, Ducke 81 (US).

Discussion:

Fig. 72, K-M.

Henriquezia verticillata Spruce ex Benth. in Hook. Kew Jour. Bot. 6: 338. 1854.

Henriquezia obovata Spruce ex Benth. Trans. Linn. Soc. 22: 297. 1859.

The leaves in the type description are stated to be " obtusiuscula v. breviter et acuta acuminata" at the apex, and "cuneato-acuta" at the base; they vary on the same specimen from broadly rounded at the apex with a minute mucro to, especially the uppermost ones subtending the lowest inflorescence branches, cuspidate or abruptly acute to acuminate, and at the base from cuneately narrowed to subcordate. This is shown by specimens of Froes 21518 and Froes 22784 (NY), in which some leaves are cuneate, others rounded at base. Duplicate specimens of these same numbers seen by Bremekamp apparently had all the leaves rounded at base, causing him to err in believing that these numbers differed from typical H. verticillata in cuneate versus rounded leaf-bases. He also misjudged in believing that these numbers, together with Ducke 81 and 22813, had the leaves with a smaller number of pairs of nerves (7-9 instead of 11). Although Bentham does not account for the number of lateral pairs of nerves in his original description of H. verticillata, actually an examination of the isotype specimen of H. verticillata (Spruce 1957) at NY shows 9-10 pairs of nerves, while a photo of the holotype of this number at K at NY shows leaves with 10 pairs. The NY specimen of Froes 22784 does not have the 7-9 pairs of lateral nerves stated as such to be the case by Bremekamp, but has 7-10 pairs, while the Froes 21518 sheet at NY shows leaves also having 7-10 pairs. Therefore, variation extends to 10 pairs on the sheets at NY of the same numbers seen by Bremekamp and stated by him (loc. cit. p. 376) as having 7-9 pairs.

The leaves in H . verticillata are often 5-verticillate, but may be 4-verticillate, and in the collection of Maguire, Wurdack, dc Bunting 36432 they are both 4- or 5-verticillate.

Distribution:Brazil South America| Venezuela South America|