Vines and Climbing Plants of Puerto Rico and the Virgin Islands

Vines and Climbing Plants of Puerto Rico and the Virgin Islands 163
6a. Leaves entire, reniform, with the apex retuse, 0.3-1.8 cm long ................................ 18. I. steudelii
6b. Leaves pinnatisect, 2-10 cm long ..............................................................................15. I. quamoclit
7a. Corolla bright pink; sepals pink; leaf with the base truncate, obtuse, or sometimes subcordiform.........8
7b. Corolla red-orange; sepals green; leaf cordiform at the base................................... 5. I. hederifolia
8a. Corolla with the limb entire or with 5 shallow, ovate, and expanded lobes ...... 10. I. microdactyla
8b. Corolla with the limb deeply 5-lobed, the lobes oblong and reflexed ........................16. I. repanda
9a. Leaves palmately compound............................................................................................................ 10
9b. Leaves simple, entire, or trilobed .................................................................................................... 11
10a. Corolla bright pink or crimson, thick, ca. 6 cm long; calyx smooth; peduncle thick, straight ......
............................................................................................................................ 6. I. horsfalliae
10b. Corolla pale violet or purple, membranaceous, 1.5-2.5 cm long; calyx verrucose; peduncle filiform,
spirally twisted .............................................................................................................. 24. I. wrightii
11a. Plants creeping or sometimes the younger portions of the stem twining, producing roots in the
area of the nodes that are in contact with the soil .......................................................................... 12
11b. Plants ascending, twining, rarely producing roots at the nodes (I. setifera) ............................... 14
12a. Plants strictly creeping; common on sandy coasts of the littoral zone ........................................ 13
12b. Plants with the basal portion creeping, the younger portions ascending, twining; plants cultivated
or escaped from cultivation .............................................................................................. 2. I. batatas
13a. Corolla pink or lavender; leaves oblong to rounded, the apex deeply emarginate and
mucronate........................................................................................................ . 13. I. pes-caprae
13b. Corolla white with a yellow center; leaves oblong to lanceolate, the apex emarginate and mucronate
.............................................................................................................................. 7. I. imperati
14a. Leaves reniform or lyrate, < 1.5 cm long, clustered on short axillary branches; petioles usually
longer than the leaf blade ............................................................................................... 4. I. eggersii
14b. Leaves not reniform or lyrate, alternate, not clustered on short axillary branches ..................... 15
15a. Corolla yellow with the center purple ...................................................................... 12. I. ochracea
15b. Corolla of other colors ................................................................................................................... 16
16a. Plant with at least some or all of the leaves trilobed .................................................................... 17
16b. Leaves entire, never lobed ............................................................................................................. 21
17a. Corolla 1.4-1.6 cm long ................................................................................................ 22. I. triloba
17b. Corolla 1.8 cm long or longer ....................................................................................................... 18
18a. Calyx glabrous or puberulous; corolla 5-7 cm long, violet to violet-pink .................... 8. I. indica
18b. Calyx hirsute; corolla 1.5-4.5 cm long, lilac, pale blue, whitish, pink, or violet-blue ............... 19
19a. Corolla 1.5-3 cm long; inflorescences of double dichasia resembling a head; bracts 1.5-3 cm long,
forming an involucre at the base of the inflorescences .................................................... 9. I. meyeri
19b. Corolla 4-4.5 cm long; inflorescences of simple dichasia or sometimes the flower solitary; bracts
4-4.5 mm long, not forming an involucre ....................................................................................... 20