Monographs Details: Perama hirsuta var. stricta (Benth.) Bremek.
Authority: Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.
Description:Distribution and Ecology - Distribution. Rare and scattered in the range of var. hirsuta in British southern Venezuela, and eastern Brazil. BRITISH GUIANA. Sand Creek, Rupununi River, Oct 1948, W B 280 (NY); savanna, basin of Rupununi River, Wichabai, 26 Oct 1937, A. C. Smith 2302 (NY); same locality and date, A. C. Smith 2277 (NY); Waruni-Ituni savannahs, along the Berbice-Rupununi Cattle trail, 20 May 1919, Abraham 135 (NY); Schomburgk 100 (isotype of P. stricta Benth., NY); Pirara, 1841-2, Schomburgk 391 (P). VENEZUELA. Bolivar: Camarata; alt. 450 m; Mar 1939, G. G. Simpson 25 (VEN). Amazonas: Esmeralda, Esmeralda Savana, near Orinoco River; 21 Aug 1944, Steyermark 57766 (F). BRAZIL. Bahia: 1836, Blanchet 2424 (NY). Terr, do Rio Braneo: Frechal, 5 Sep 1927, Tate 47 (NY).
Fig. 81, K-M.
Perama stricta Benth. in Hook. Jour. Bot. 3: 239. 1841.
The photo of the type collection of Perama hirsuta Aubl. shows a taxon with broad ovate, divaricate leaves and this is further emphasized by plate 18 accompanying Aublet's original description. Moreover, Aublet's description of the stems having "villoso" pubescence refers to the type of spreading pubescence characteristic of the lower portion of the stem of P. hirsuta. On the other hand, the isotype of P. stricta Benth., which I have examined at NY, shows the pubescence on the lower part of the stem appressed to ascending with smaller narrower lanceolate leaves. This taxon (P stricta) tends to have stems less branched and with generally fewer, often solitary heads terminating a stem. However, various intergradations exist between this taxon and typical P. hirsuta, for which I have followed Bremekamp's treatment of reduction of P. stricta to a varietal category under P hirsuta. K. Schumann (Fl. Bras. 6(6) : 90. 1889) misinterpreted Pstricta, placing it as a synonym under P galioides, whereas, because of its opposite pairs of leaves, he should have placed it with P. hirsuta. Several collections, such as Maguire, Cowan, & Wurdack 30938, Britton & Britton 2911, Fendler 991, Britton, Britton, d. Hazen 74, Baldwin, Jr. 4069, Vie 7636, Cardona 785, and Duss 1450, are somewhat intermediate in approaching the habit and in showing the tendency toward reduced leaves of var. stricta, but have been placed with var. hirsuta because of the spreading pubescence of the lower part of the stem, together with subovate spreading leaves.
In general the lower half of the stems is covered with spreading hairs in P. hirsuta var. hirsuta, but rarely have few hairs, becoming almost glabrate as in the collections of A. C. Smith 2173 from British Guiana and Coulon 173 from Surinam. These collections, likewise, show leaves wholly or mainly without the characteristic pubescence present in most specimens of P. hirsuta var. hirsuta or var. stricta. This tendency towards a glabrate-leaved condition is also exhibited by Vie 7636, Cardona 833, and Samuels 246. As there are varying degrees in the
amount of foliar pubescence present which do not appear to be correlated, and as the reduction of hairs may possibly be correlated with age and maturity of the plant, no separate category has at the present time been given for the specimens with the glabrate-leaved tendency.
Some authors (Schumann, Standley) have considered Mattuschkea hispida H.B.K. as synonymous with Perama hirsuta. However, as is showm under my treatment of P. galioides (H.B.K.) Poir., Humboldt & Bonpland's M. hispida refers to a plant with the ternate-leaved condition characteristic of the P. galioides group, rather than to leaves decussate in pairs, as characterizing the P. hirsuta group.
Distribution:Guyana South America
| Venezuela South America