Chusquea subg. Swallenochloa (McClure, 1973) Clark, 1997

Pianissola, Evandro Machado, Parma, Daniele F., Santos-Gonçalves, Ana Paula & Clark, Lynn G., 2018, Two new species of Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) from Minas Gerais, Brazil, and complete description of C. caparaoensis, Phytotaxa 358 (3), pp. 235-250 : 247

publication ID

https://doi.org/ 10.11646/phytotaxa.358.3.2

persistent identifier

https://treatment.plazi.org/id/9E50C245-A019-B612-FF5A-FF0FFA5CC175

treatment provided by

Felipe

scientific name

Chusquea subg. Swallenochloa
status

 

Key to the species of Chusquea subg. Swallenochloa in Brazil (based on vegetative specimens)

1. Foliage leaf sheaths deciduous from the lower nodes of the subsidiary branches.............................................................................2

- Foliage leaf sheaths persistent ............................................................................................................................................................8

2. Central bud/branch flanked by 1 ‒ 3 subsidiary buds/branches on each side in one linear row; branching intravaginal....................3

- Central bud/branch subtended by 1 ‒ 2 rows of subsidiary buds/branches, or subtended by 4 ‒ 5 tiers and flanked by 4 ‒ 5 subsidiary buds/branches; branching extravaginal..............................................................................................................................................4

3. Foliage leaf blades on vegetative branches 0.2–0.4 mm wide, L:W = 10.3 ‒ 20................................................................ C. fruticosa View in CoL

- Foliage leaf blades (0.5 ‒) 0.8 ‒ 1 mm wide, L:W = 5.5 ‒ 8.6............................................................... C. windischii Clark (1992: 405) View in CoL

4. Central bud/branches flanked by slightly smaller subsidiary buds/branches, and subtended by 4 ‒ 5 rows of medium to small sized subsidiary buds/branches; foliage leaves with inner ligules 0.2 ‒ 0.5 (‒ 1) mm long, truncate, and sheaths mottled....... C. juergensii View in CoL

- Central bud/branch subtended, not flanked, by 1 or 2 rows of subsidiary buds/branches; foliage leaves with inner ligules 0.5 ‒ 4.0 mm long, rounded or slightly rounded, and sheaths uniform in color, not mottled...........................................................................5

5. Central bud nearly circular; culm leaf blade narrowly triangular, erect becoming reflexed, caducous; smaller subsidiary branches 4 ‒ 10 per node ................................................................................................................................... C. nudiramea Clark (1992: 415) View in CoL

- Central bud triangular; culm leaf blade triangular, erect, persistent; smaller subsidiary branches 15 ‒ 80 per node ..........................6

6. Central bud/branch subtended by 1 ‒ 2 more or less linear rows of subsidiary buds/branches; foliage leaf blades 0.18 ‒ 0.25 cm wide, L:W = (22.5 ‒) 25.6 ‒ 33............................................................................................................................................... C. caparaoensis View in CoL

- Central bud/branch subtended and partially encircled by 1 ‒ 2 rows of subsidiary buds/branches; foliage leaf blades (0.2 ‒) 0.5 ‒ 0.9 (‒ 1.2) cm wide, L:W = (4 ‒) 7.5 ‒ 24....................................................................................................................................................7

7. Culm leaf sheaths 1 ‒ 5 times as long as the blade; smaller subsidiary branches 15 ‒ 40 per node; foliage leaf blades (0.3 ‒) 0.5 ‒ 0.9 (‒ 1.2) cm wide, L:W = (4 ‒) 7.7 ‒ 15, base attenuate to rounded-attenuate ........................................................................................... .................................................................................................................... C. mimosa McClure & Smith (1967: 37) subsp. mimosa View in CoL

- Culm leaf sheaths (3.5 ‒) 12 ‒ 27.5 (‒ 50) times as long as the blade; smaller subsidiary branches 45 ‒ 80 per node; foliage leaf blades (0.2 ‒) 0.4 ‒ 0.7 cm wide, L:W = 10.6 ‒ 24, base attenuate............................................. C. mimosa subsp. australis Clark (1992: 414) View in CoL

8. Branching extravaginal; subsidiary branches (12 ‒) 20 ‒ 60 per node, more or less horizontally exserted, in 2 ‒ 6 rows, constellate ... ............................................................................................................................................................................................................9

- Branching intravaginal; subsidiary branches 3 ‒ 20 (‒ 30) per node, erect, in 1 row, linear ..............................................................10

9. Foliage leaf blades 1.3 ‒ 3.7 cm long, 0.2 ‒ 0.4 cm wide; subsidiary branches 3 ‒ 15 cm long, (12 ‒) 20 ‒ 45 per node, the central branch usually developing, robust; nodes with the supranodal ridge prominent; subsidiary buds in 2 rows in a crescent-shaped arrangement; culms 1 ‒ 2 (‒ 3.5) m tall......................................................................................................... C. heterophylla Nees (1835: 488) View in CoL

- Foliage leaf blades 0.8 ‒ 2 cm long, 0.1 ‒ 0.2 cm wide; subsidiary branches 1.5 ‒ 4 cm long, 30 ‒ 60 per node, the central branch usually not developing; nodes with the supranodal ridge obscure; subsidiary buds in 5 or 6 rows in a triangular arrangement; culms 0.5 ‒ 1 m tall.................................................................................................. C. microphylla View in CoL (Döll in Martius 1880: 207) Clark (1992: 420)

10. Central branch curving away from the main culm, sometimes more or less erect at the base before curving ................................11

- Central branch erect and more or less appressed to the main culm for its full length......................................................................13

11. Foliage leaves 8 ‒ 10 (‒ 13) per complement; foliage leaf blades 0.3 ‒ 0.4 cm wide; Serra do Ibitipoca , Minas Gerais ........................ ....................................................................................................................................................................................... C. riosaltensis View in CoL

- Foliage leaves 3 ‒ 8 per complement; foliage leaf blades 0.4 ‒ 1 cm wide; Morro da Igreja , Santa Catarina ....................................12

12. Culms ca. 1 m tall; subsidiary branches 4 ‒ 11 cm long; central branch strongly sinuous ............................................... C. windischii View in CoL

- Culms 1 ‒ 1.5 m tall; subsidiary branches 4 ‒ 16 cm long; central branch gently curved....................................................................... .......................................................................................................................................... C. hatschbachii Clark & Blong (2009: 29) View in CoL

13. Foliage leaf blades 0.06 ‒ 0.25 (‒ 0.4) cm wide, L:W = 17 ‒ 60, the base attenuate............................................................................14

- Foliage leaf blades 0.35 ‒ 1.1 cm wide, L:W = 6.5 ‒ 14, the base truncate-rounded to rounded-attenuate ........................................16

14. Central bud/branch flanked by subsidiary buds/branches; foliage leaf blades L:W = (25 ‒) 33 ‒ 60; culm leaf sheaths fused at the base for 0.3 ‒ 1.5 cm, the blade usually not distinguishable from the sheath ........................................... C. nutans Clark (1992: 398) View in CoL

- Central bud/branch subtended by subsidiary buds/branches; foliage leaf blades L:W = 8 ‒ 31; culm leaf sheaths not fused at the base, blades distinguishable from the sheath....................................................................................................................................15

15. Internodes sulcate, 14 ‒ 20 cm long; culm leaves deciduous, (20 ‒) 33 ‒ 55 cm long, extending (1.4 ‒) 2 ‒ 3 times the internode length, abaxially with setose trichomes at the base; foliage leaf blades L:W = (8 ‒) 10 ‒ 17.3 .................................................... C. imbricata View in CoL

- Internodes terete, 3 ‒ 11 cm long; culm leaves persistent, 5.3 ‒ 14.2 cm long, usually shorter than or equaling one internode but sometimes longer, never more than 1.3 times the internode length, abaxially glabrous or retrorsely scabrous; foliage leaf blades L: W = 17 ‒ 31 .............................................................................................. C. pinifolia View in CoL (Nees in Martius 1829: 525) Nees (1835: 490)

16. Foliage leaf blades 0.8 ‒ 1.1 cm wide .............................................................................. C. sclerophylla Döll View in CoL in Martius (1880: 200)

- Foliage leaf blades 0.35 ‒ 0.5 (‒ 0.7) cm wide....................................................................................................................................17

17. Foliage leaves 10 ‒ 13 per complement; foliage leaf blades with L:W = 6.5 ‒ 11; foliage leaf sheaths glabrous to softly pubescent toward the apex; culm leaves abaxially glabrous............................................................................ C. baculifera Silveira (1919: 99) View in CoL

- Foliage leaves 19 ‒ 24 per complement; foliage leaf blades with L:W = 11 ‒ 14; foliage leaf sheaths pubescent-hispid between the nerves; culm leaves abaxially pubescent................................................................................................. C. erecta Clark (1992: 397) View in CoL

Kingdom

Plantae

Phylum

Tracheophyta

Class

Liliopsida

Order

Poales

Family

Poaceae

Genus

Chusquea

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