Anthurium sect. Urospadix subsect. Insculptinervia, Engler, 1898

Identification key to Anthurium sect. Urospadix subsect. Insculptinervia species

1. Stem reptant........................................................................................................................................................................................2

- Stem erect ...........................................................................................................................................................................................3

2. Base of the leaf blade truncated to obtuse, angle between the spathe and peduncle straight, fruit green at the base and brown at the apex........................................................................................................................................................................ A. megapetiolatum

- Base of the leaf blade rounded to cordate, angle between the spathe and peduncle obtuse, fruit red................................ A. longipes

3. Leaf blade with glandular dots ...........................................................................................................................................................4

- Leaf blade without glandular dots ......................................................................................................................................................7

4. Base of the leaf blade usually cordate, sometimes truncate, rarely rounded, with sinus ...................................................................5

- Base of the leaf blade rounded to truncate, without sinus................................................................................................. A. marense

5. Leaf blade deflexed to perpendicular in relation to the stem ............................................................................................. A. hoehnei

- Leaf blade erect in relation to the stem ..............................................................................................................................................6

6. Petiole flat to caniculated with acute margins to subcarenated adaxially, spathe navicular forming a straight angle with the peduncle ................................................................................................................................................................................ A. unense

- Petiole cylindrical to slightly sulcate with obtuse margins adaxially, spathe flattened forming acute angle with the peduncle ......... ....................................................................................................................................................................................... A. fontellanus

7. Epiphyte or rupicolous, spathe generally caducuous, spadix gray in post-anthesis............................................................ A. comtum

- Terrestrial, spathe persistent, spadix not gray in post-anthesis...........................................................................................................8

8. Petiole larger than the leaf blade, fruit greenish with apex vinaceous .............................................................................. A. cipoense

- Petiole shorter or with the same size as the leaf blade, fruit greenish................................................................................................9

9. Petiole shorter than the leaf blade ....................................................................................................................................................10

- Petiole with the same lenght as the leaf blade..................................................................................................................................14

10. Peduncle larger than the petiole........................................................................................................................................................11

- Peduncle with the same lenght or shorter than the petiole ...................................................................................... A. brigadeiroense

11. Fruit green ........................................................................................................................................................................................12

- Fruit vinaceous .................................................................................................................................................................................13

12. Secondary veins 21-25, leaf blade 30-70 cm length, geniculum 5-8 mm length ............................................................... A. galeottii

- Secondary veins 9-14, Leaf blade 14-47 cm length, geniculum 2-6 mm length..................................................... A. brigadeiroense

13. Petiole caniculated adaxially, spadix stipitate .................................................................................................................. A. nitidulum

- Petiole sulcate adaxially, spadix sessile............................................................................................................................... A. eichleri

14. Spadix stipitate, fruits green with white dots at the apex and white shades at the base......................................................... A. narae

- Spadix sessile, fruits greenish...........................................................................................................................................................15

15. Petiole flattened to slightly sulcate with obtuse margins adaxially, unripened fruit green ........................................... A. caparoense

- Petiole sulcate with margins that are frequently obtuse, unripened fruits vinaceous.................................................. A. atrovinosum